10 ms·

USB 3.0 Promoter Group Announces USB Type-C Connector Ready for Production [pdf]

70 points by Deinos 12y ago

mankyd 12y ago
> Reversible plug orientation and cable direction That's all I needed to read.
- Lifescape 12y ago
  Now you only have to plug it in one time instead of three!
  - deleted 12y ago
    [deleted]
    - matt2000 12y ago
      We are all complete oafs.
      - tracker1 12y ago
        My tablet port faces one direction, my phone the other... it is not that easy... I've also got cables that aren't clearly labelled on the micro side... When you're half asleep at the end of the day, it's not that great... I want to know why it took so long to come up with a reversible plug.
    - soperj 12y ago
      Agreed. I manage to do it in the dark every night plugging in my cell phone. Really...
    - hatandsocks 12y ago
      Unfortunately, the original USB spec recommended connectors with spin-1/2 rotational symmetry, so you sometimes have to rotate the plug more than 360 degrees to make it fit in the port.
    - ihuman 12y ago
      True, but sometimes it is not easily visible, or you want to plug it in without looking at it.
    - jsmthrowaway 12y ago
      Eyes should not be mandatory to operate a USB cable. I can think of no other consumer cable that requires me to stare at it while I plug it in.
      - epochwolf 12y ago
        Clearly you have not attempted to use an S-Video cable. :)
        ahknight 12y ago
        Eh, I cut my teeth on old Apple serial ports. Same mini-DIN8 cable. Feel for the flat part and jam it in. I've lost surprisingly few pins with that strategy.
    - epochwolf 12y ago
      That only works if 1. The cable has a logo. 2. You can see the logo. 3. The device and cable both conform to the standard. 4. The port is not vertical. 5. The device you are plugging in is not on it's side or upside down. 6. The user is sober and of a clear, calm mind.
      - makomk 12y ago
        The cable that came with my Moto G improves on this by making the top, logo side slightly concave and the other side slightly convex. You can literally feel which way up you've got the plug.
        unwiredben 12y ago
        We did that on the cables for the Palm webOS devices too -- the top side all had a silver depression for easy finger feel.
        aidenn0 12y ago
        And I still preferentially use my Palm Pre cables (back in the day, I dremmeled down the plastic housing of another usb-micro I had so it would fit in the touchstone, since I never unplugged that one, and could use the palm-pre one for other uses).
        andrioni 12y ago
        That only helps when you know the cable beforehand. The cable that came with my Motorola RAZR i cable has the high relief on one side of the connector, while the one from my Nexus 7 has it on the other side.
    - aroch 12y ago
      The USB ports on my computers aren't all oriented the same way (even on the same computer / motherboard), some USB peripherals are labeled on the "right" side some on the wrong. Sometimes even when you have it oriented the correct way, it doesn't always go in because you have it slightly cockeyed. Sometimes its dark and you can't see which way is up. There are many reasons why single-sided (but not obviously sided) connections are hard to plug in and most of them don't have to do with the user being stupid.
      - deleted 12y ago
        [deleted]
  - boyaka 12y ago
    http://cdn.thedroidguy.com/wp-content/uploads/2014/04/USB-plug-in-problems.jpg http://cdn.thedroidguy.com/wp-content/uploads/2014/04/USB-pl... Source article actually relevant to topic: http://thedroidguy.com/2014/04/next-generation-usb-type-c-cable-to-come-in-july-solves-usb-wrong-insertion-problems-88874 http://thedroidguy.com/2014/04/next-generation-usb-type-c-ca...
asadotzler 12y ago
Where are the photos of the connector?
- eli 12y ago
  I think it's this http://9to5mac.files.wordpress.com/2014/04/usb-type-c-01.png http://9to5mac.files.wordpress.com/2014/04/usb-type-c-01.png
  - mrsebastian 12y ago
    No, that's a mock-up from earlier in the year, made by Foxconn. (It's still fairly accurate, mind you - but the link above gives you a better idea of the socket/connector layout.)
- kyrra 12y ago
  A few diagrams here: http://www.extremetech.com/computing/187882-reversible-usb-type-c-connector-finalized-devices-cables-and-adapters-coming-soon http://www.extremetech.com/computing/187882-reversible-usb-t...
- coldpie 12y ago
  Some different connector configurations at the Ars article: http://arstechnica.com/gadgets/2014/08/small-reversible-usb-type-c-connector-finalized/ http://arstechnica.com/gadgets/2014/08/small-reversible-usb-...
  - deleted 12y ago
    [deleted]
bcohen5055 12y ago
Just as Randal publishes this...http://xkcd.com/1406/ http://xkcd.com/1406/
- deleted 12y ago
  [deleted]
tekacs 12y ago
The USB Power Delivery spec is pretty interesting too - up to 100W @ 20V over USB (presumably with modified cabling, too :P) http://www.extremetech.com/computing/172113-usb-power-delivery-spec-demoed-for-the-first-time-can-provide-up-to-100w-and-usb-3-0-over-a-single-cable http://www.extremetech.com/computing/172113-usb-power-delive... (a link from a link on this comments page)
- melling 12y ago
  Powering an external monitor from a laptop is appealing. One cord to the wall. Even cooler, would be driving an external monitor from a smartphone.
  - tekacs 12y ago
    > Even cooler, would be driving an external monitor from a smartphone. I worry somewhat about the smartphone's battery in this context. I wonder if any have good 'passthrough' for when the battery is full and a wall socket is connected - even then I doubt it. :/
  - IgorPartola 12y ago
    > Even cooler, would be driving an external monitor from a smartphone. That will be expensive though. You'll have to pay the medical bills for getting your back fixed after having to carry the suitcase with the batteries :). Current cell-phones have batteries around 2 Amp-hours. At 5 volts, that's 10 Watt-hours. The least-power hungry display according to [1] is a 15 inch LED; it clocks in at 15 Watts. This means you'd be able to use your external 15 inch display for 40 minutes before completely draining your battery. That is not counting anything the phone is actually doing, just powering the display. [1] http://energyusecalculator.com/electricity_lcdleddisplay.htm http://energyusecalculator.com/electricity_lcdleddisplay.htm
    - seanp2k2 12y ago
      So with this new tech, it looks like you could charge the smartphone from the monitor while sending video from phone -> monitor? Sounds awesome.
deckiedan 12y ago
I'm not an apple fanboy - but I do really like their magsafe & iPad mini connectors (whatever those are called officially). One thing I really like is the lack of "sticky-out-bit" in the middle of the connector, which all USB sockets seem to have, and which always feels kind of unstable or weak to me. Is there a reason why all USB sockets - including these new diagrams - have a feeble looking centre part rather than it being part of the outer ring?
- mvid 12y ago
  Came to ask the same thing. Those little pins always break for me.
- ChuckMcM 12y ago
  > Is there a reason why all USB sockets - including these > new diagrams - have a feeble looking centre part rather > than it being part of the outer ring? The outer part is the RF shield. That increases reliability by protecting the low voltage (but high frequency) USB data signals from coupling to outside interference (50/60 hz stray emf from power lines, switching power supply noise, etc). The magsafe connectors are just pulling power so don't really need that level of shielding.
  - MBCook 12y ago
    But what about the Lightning connectors on iPads and iPhones? They don't have that outside shield but they carry high speed signals.
    - deleted 12y ago
      [deleted]
    - ChuckMcM 12y ago
      The lightning connector is pretty cool isn't it? Apple figured out you could build the RF shield around the signal lines in a single planar unit. If you look at the original 30 pin connector they did, they used a very similar scheme to USB the shield around the outside of the connector, the signal lines on the inside in a separate piece. I actually think it was the lightning connector that got the USB group to go back and look at their connector designs. The interesting bit about the shield on the lightning is the fairly tricky way they create an island in the middle of the shield and thread the signal lines through it. Makes for a more expensive cable I expect.
yincrash 12y ago
They also said it supports the USB PD to up to 100W (@ 20V) which is enough current (5A) to support stuff like a Macbook Air.
- XorNot 12y ago
  Its enough to support any laptop I know of. Very vew exceed 100W.
  - reitzensteinm 12y ago
    Pretty much the only way to exceed 100W is to be running a high end gaming laptop, while actively playing games. A desktop equivalent(ish) quad core hyperthreaded i7-4700MQ that turbos up to 3.4ghz only has a 47W TDP, which is a worst case number, so even heavy duty number crunching isn't enough. Even exceeding 100W, you'll still be draining the battery much more slowly than when unplugged. At 125W the battery will last 5x longer. It's hard to imagine a real world situation where 100W would be insufficient, where the user wouldn't be very much better off using a desktop machine for gaming.
rreay 12y ago
Oh joy, they still use that damn diving board design on the device side. I've broken 3 devices when that diving board breaks.
- dublinben 12y ago
  Really? How aggressively are you plugging in your USB cables?
  - mvid 12y ago
    I have the same problem. One faulty or aggressive plug angle, and you break some pins or the inner paddle cracks.
  - droopyEyelids 12y ago
    It happens in any environment with a lot of vibration.
  - delecti 12y ago
    Seriously, I've only ever damaged a USB plug when forcing it to go in the wrong way, which this will prevent.
bjackman 12y ago
Sounds great! For anyone not sure of the context, right now Type-A is the "host" end and type-B is the "device" end. However since OTG was introduced that correlation isn't concreted and can reverse during the connection. I might have misunderstood but it sounds like Type-C will be a symmetrical affair (the cable will be reversible). I guess this opens the door for totally new use cases for USB? With extensions to the OTG system we could be connecting two hosts for e.g. transferring files between laptops. Again I could be wrong about that. Also 100W power is great - The power delivery capability of current USB is really limiting. And reversible cable orientation? We are entering a glorious new era.
ksec 12y ago
Um.. wouldn't the small piece in the computer's end break easily since it is so thin.. and small. And how does it delivery 100W of power with cable that thin?
- seanp2k2 12y ago
  I'm guessing it does 100w only at 20v, which is 5A, which, with proper engineering, could be carried over 22-24 AWG wire according to https://www.eol.ucar.edu/rtf/facilities/isff/LOCAL_access_only/Wire_Size.htm https://www.eol.ucar.edu/rtf/facilities/isff/LOCAL_access_on... For an example of how thick 24AWG wire is (22 is thicker), your standard CAT5E wire is 8 strands of 24AWG, so with the current-standard USB wiring of VCC (5v DC pos), Data (neg), Data (pos), GND (5v DC neg), it'd be ~half as thick as CatV (but would probably have different shielding). However, according to http://pinoutsguide.com/Slots/usb_3_0_connector_pinout.shtml http://pinoutsguide.com/Slots/usb_3_0_connector_pinout.shtml , the powered USB 3.0 connector has 11 pins, which would be ~lamp cord thickness, or probably comparable to those ~10ft USB printer cables. Consider how thick overhead power lines are and how much power they carry in watts, and how thick + long your vacuum cleaner cord is with how much that carries (a Dyson DC33 takes 1190 watts): http://www.cockeyed.com/science/power_use_database/dyson_vacuum_cleaner.html http://www.cockeyed.com/science/power_use_database/dyson_vac... Here is a good primer on wire capacity and how it relates to volts, amps, watts, and wire diameter: http://www.rowand.net/Shop/Tech/WireCapacityChart.htm http://www.rowand.net/Shop/Tech/WireCapacityChart.htm TL;DR totally possible with 20vdc to use a wire thinner than a BIC pen to deliver 100w ~6ft in addition to high-speed data.
debian69 12y ago
Doesn't look at all like lightning connector :)
ChuckMcM 12y ago
This will be interesting, and its needed to keep up with the evolving use of USB. The downside is that once this is everywhere you will be keeping a drawer full of USB adapters (kind of like those USB/PS2 keyboard adapters that are everywhere, or DVI/VGA)
seanp2k2 12y ago
I'm surprised they're not calling it ~"USB Smart" like Bluetooth: http://www.bluetooth.com/Pages/Bluetooth-Smart-Devices.aspx http://www.bluetooth.com/Pages/Bluetooth-Smart-Devices.aspx The logo for "USB 3.1 SuperSpeed +" is very similar to the current "SuperSpeed USB" logo: http://low-powerdesign.com/donovansbrain/wp-content/uploads/2014/06/superspeed-usb-logo-1.png http://low-powerdesign.com/donovansbrain/wp-content/uploads/... EDIT: Here's the USB 3.1 logo (USB 3.0 logo above for comparison): http://upload.wikimedia.org/wikipedia/commons/4/4c/Usb-3.1-logo.jpg http://upload.wikimedia.org/wikipedia/commons/4/4c/Usb-3.1-l...
PhasmaFelis 12y ago
One step closer to that glorious day when the back of my desktop has like 20 USB sockets and nothing else.

70 points by Deinos 12y ago

mankyd 12y ago

> Reversible plug orientation and cable direction That's all I needed to read.

Lifescape 12y ago
Now you only have to plug it in one time instead of three!
- deleted 12y ago
  [deleted]
  - matt2000 12y ago
    We are all complete oafs.
    - tracker1 12y ago
      My tablet port faces one direction, my phone the other... it is not that easy... I've also got cables that aren't clearly labelled on the micro side... When you're half asleep at the end of the day, it's not that great... I want to know why it took so long to come up with a reversible plug.
  - soperj 12y ago
    Agreed. I manage to do it in the dark every night plugging in my cell phone. Really...
  - hatandsocks 12y ago
    Unfortunately, the original USB spec recommended connectors with spin-1/2 rotational symmetry, so you sometimes have to rotate the plug more than 360 degrees to make it fit in the port.
  - ihuman 12y ago
    True, but sometimes it is not easily visible, or you want to plug it in without looking at it.
  - jsmthrowaway 12y ago
    Eyes should not be mandatory to operate a USB cable. I can think of no other consumer cable that requires me to stare at it while I plug it in.
    - epochwolf 12y ago
      Clearly you have not attempted to use an S-Video cable. :)
      - ahknight 12y ago
        Eh, I cut my teeth on old Apple serial ports. Same mini-DIN8 cable. Feel for the flat part and jam it in. I've lost surprisingly few pins with that strategy.
  - epochwolf 12y ago
    That only works if 1. The cable has a logo. 2. You can see the logo. 3. The device and cable both conform to the standard. 4. The port is not vertical. 5. The device you are plugging in is not on it's side or upside down. 6. The user is sober and of a clear, calm mind.
    - makomk 12y ago
      The cable that came with my Moto G improves on this by making the top, logo side slightly concave and the other side slightly convex. You can literally feel which way up you've got the plug.
      - unwiredben 12y ago
        We did that on the cables for the Palm webOS devices too -- the top side all had a silver depression for easy finger feel.
        aidenn0 12y ago
        And I still preferentially use my Palm Pre cables (back in the day, I dremmeled down the plastic housing of another usb-micro I had so it would fit in the touchstone, since I never unplugged that one, and could use the palm-pre one for other uses).
      - andrioni 12y ago
        That only helps when you know the cable beforehand. The cable that came with my Motorola RAZR i cable has the high relief on one side of the connector, while the one from my Nexus 7 has it on the other side.
  - aroch 12y ago
    The USB ports on my computers aren't all oriented the same way (even on the same computer / motherboard), some USB peripherals are labeled on the "right" side some on the wrong. Sometimes even when you have it oriented the correct way, it doesn't always go in because you have it slightly cockeyed. Sometimes its dark and you can't see which way is up. There are many reasons why single-sided (but not obviously sided) connections are hard to plug in and most of them don't have to do with the user being stupid.
    - deleted 12y ago
      [deleted]
- boyaka 12y ago
  http://cdn.thedroidguy.com/wp-content/uploads/2014/04/USB-plug-in-problems.jpg http://cdn.thedroidguy.com/wp-content/uploads/2014/04/USB-pl... Source article actually relevant to topic: http://thedroidguy.com/2014/04/next-generation-usb-type-c-cable-to-come-in-july-solves-usb-wrong-insertion-problems-88874 http://thedroidguy.com/2014/04/next-generation-usb-type-c-ca...

asadotzler 12y ago

Where are the photos of the connector?

eli 12y ago
I think it's this http://9to5mac.files.wordpress.com/2014/04/usb-type-c-01.png http://9to5mac.files.wordpress.com/2014/04/usb-type-c-01.png
- mrsebastian 12y ago
  No, that's a mock-up from earlier in the year, made by Foxconn. (It's still fairly accurate, mind you - but the link above gives you a better idea of the socket/connector layout.)
kyrra 12y ago
A few diagrams here: http://www.extremetech.com/computing/187882-reversible-usb-type-c-connector-finalized-devices-cables-and-adapters-coming-soon http://www.extremetech.com/computing/187882-reversible-usb-t...
coldpie 12y ago
Some different connector configurations at the Ars article: http://arstechnica.com/gadgets/2014/08/small-reversible-usb-type-c-connector-finalized/ http://arstechnica.com/gadgets/2014/08/small-reversible-usb-...
- deleted 12y ago
  [deleted]

bcohen5055 12y ago

Just as Randal publishes this...http://xkcd.com/1406/ http://xkcd.com/1406/

deleted 12y ago
[deleted]

tekacs 12y ago

The USB Power Delivery spec is pretty interesting too - up to 100W @ 20V over USB (presumably with modified cabling, too :P) http://www.extremetech.com/computing/172113-usb-power-delivery-spec-demoed-for-the-first-time-can-provide-up-to-100w-and-usb-3-0-over-a-single-cable http://www.extremetech.com/computing/172113-usb-power-delive... (a link from a link on this comments page)

melling 12y ago
Powering an external monitor from a laptop is appealing. One cord to the wall. Even cooler, would be driving an external monitor from a smartphone.
- tekacs 12y ago
  > Even cooler, would be driving an external monitor from a smartphone. I worry somewhat about the smartphone's battery in this context. I wonder if any have good 'passthrough' for when the battery is full and a wall socket is connected - even then I doubt it. :/
- IgorPartola 12y ago
  > Even cooler, would be driving an external monitor from a smartphone. That will be expensive though. You'll have to pay the medical bills for getting your back fixed after having to carry the suitcase with the batteries :). Current cell-phones have batteries around 2 Amp-hours. At 5 volts, that's 10 Watt-hours. The least-power hungry display according to [1] is a 15 inch LED; it clocks in at 15 Watts. This means you'd be able to use your external 15 inch display for 40 minutes before completely draining your battery. That is not counting anything the phone is actually doing, just powering the display. [1] http://energyusecalculator.com/electricity_lcdleddisplay.htm http://energyusecalculator.com/electricity_lcdleddisplay.htm
  - seanp2k2 12y ago
    So with this new tech, it looks like you could charge the smartphone from the monitor while sending video from phone -> monitor? Sounds awesome.

deckiedan 12y ago

I'm not an apple fanboy - but I do really like their magsafe & iPad mini connectors (whatever those are called officially). One thing I really like is the lack of "sticky-out-bit" in the middle of the connector, which all USB sockets seem to have, and which always feels kind of unstable or weak to me. Is there a reason why all USB sockets - including these new diagrams - have a feeble looking centre part rather than it being part of the outer ring?

mvid 12y ago
Came to ask the same thing. Those little pins always break for me.
ChuckMcM 12y ago
> Is there a reason why all USB sockets - including these > new diagrams - have a feeble looking centre part rather > than it being part of the outer ring? The outer part is the RF shield. That increases reliability by protecting the low voltage (but high frequency) USB data signals from coupling to outside interference (50/60 hz stray emf from power lines, switching power supply noise, etc). The magsafe connectors are just pulling power so don't really need that level of shielding.
- MBCook 12y ago
  But what about the Lightning connectors on iPads and iPhones? They don't have that outside shield but they carry high speed signals.
  - deleted 12y ago
    [deleted]
  - ChuckMcM 12y ago
    The lightning connector is pretty cool isn't it? Apple figured out you could build the RF shield around the signal lines in a single planar unit. If you look at the original 30 pin connector they did, they used a very similar scheme to USB the shield around the outside of the connector, the signal lines on the inside in a separate piece. I actually think it was the lightning connector that got the USB group to go back and look at their connector designs. The interesting bit about the shield on the lightning is the fairly tricky way they create an island in the middle of the shield and thread the signal lines through it. Makes for a more expensive cable I expect.

yincrash 12y ago

They also said it supports the USB PD to up to 100W (@ 20V) which is enough current (5A) to support stuff like a Macbook Air.

XorNot 12y ago
Its enough to support any laptop I know of. Very vew exceed 100W.
- reitzensteinm 12y ago
  Pretty much the only way to exceed 100W is to be running a high end gaming laptop, while actively playing games. A desktop equivalent(ish) quad core hyperthreaded i7-4700MQ that turbos up to 3.4ghz only has a 47W TDP, which is a worst case number, so even heavy duty number crunching isn't enough. Even exceeding 100W, you'll still be draining the battery much more slowly than when unplugged. At 125W the battery will last 5x longer. It's hard to imagine a real world situation where 100W would be insufficient, where the user wouldn't be very much better off using a desktop machine for gaming.

rreay 12y ago

Oh joy, they still use that damn diving board design on the device side. I've broken 3 devices when that diving board breaks.

dublinben 12y ago
Really? How aggressively are you plugging in your USB cables?
- mvid 12y ago
  I have the same problem. One faulty or aggressive plug angle, and you break some pins or the inner paddle cracks.
- droopyEyelids 12y ago
  It happens in any environment with a lot of vibration.
- delecti 12y ago
  Seriously, I've only ever damaged a USB plug when forcing it to go in the wrong way, which this will prevent.

bjackman 12y ago

Sounds great! For anyone not sure of the context, right now Type-A is the "host" end and type-B is the "device" end. However since OTG was introduced that correlation isn't concreted and can reverse during the connection. I might have misunderstood but it sounds like Type-C will be a symmetrical affair (the cable will be reversible). I guess this opens the door for totally new use cases for USB? With extensions to the OTG system we could be connecting two hosts for e.g. transferring files between laptops. Again I could be wrong about that. Also 100W power is great - The power delivery capability of current USB is really limiting. And reversible cable orientation? We are entering a glorious new era.

ksec 12y ago

Um.. wouldn't the small piece in the computer's end break easily since it is so thin.. and small. And how does it delivery 100W of power with cable that thin?

seanp2k2 12y ago
I'm guessing it does 100w only at 20v, which is 5A, which, with proper engineering, could be carried over 22-24 AWG wire according to https://www.eol.ucar.edu/rtf/facilities/isff/LOCAL_access_only/Wire_Size.htm https://www.eol.ucar.edu/rtf/facilities/isff/LOCAL_access_on... For an example of how thick 24AWG wire is (22 is thicker), your standard CAT5E wire is 8 strands of 24AWG, so with the current-standard USB wiring of VCC (5v DC pos), Data (neg), Data (pos), GND (5v DC neg), it'd be ~half as thick as CatV (but would probably have different shielding). However, according to http://pinoutsguide.com/Slots/usb_3_0_connector_pinout.shtml http://pinoutsguide.com/Slots/usb_3_0_connector_pinout.shtml , the powered USB 3.0 connector has 11 pins, which would be ~lamp cord thickness, or probably comparable to those ~10ft USB printer cables. Consider how thick overhead power lines are and how much power they carry in watts, and how thick + long your vacuum cleaner cord is with how much that carries (a Dyson DC33 takes 1190 watts): http://www.cockeyed.com/science/power_use_database/dyson_vacuum_cleaner.html http://www.cockeyed.com/science/power_use_database/dyson_vac... Here is a good primer on wire capacity and how it relates to volts, amps, watts, and wire diameter: http://www.rowand.net/Shop/Tech/WireCapacityChart.htm http://www.rowand.net/Shop/Tech/WireCapacityChart.htm TL;DR totally possible with 20vdc to use a wire thinner than a BIC pen to deliver 100w ~6ft in addition to high-speed data.

debian69 12y ago

Doesn't look at all like lightning connector :)

ChuckMcM 12y ago

This will be interesting, and its needed to keep up with the evolving use of USB. The downside is that once this is everywhere you will be keeping a drawer full of USB adapters (kind of like those USB/PS2 keyboard adapters that are everywhere, or DVI/VGA)

seanp2k2 12y ago

I'm surprised they're not calling it ~"USB Smart" like Bluetooth: http://www.bluetooth.com/Pages/Bluetooth-Smart-Devices.aspx http://www.bluetooth.com/Pages/Bluetooth-Smart-Devices.aspx The logo for "USB 3.1 SuperSpeed +" is very similar to the current "SuperSpeed USB" logo: http://low-powerdesign.com/donovansbrain/wp-content/uploads/2014/06/superspeed-usb-logo-1.png http://low-powerdesign.com/donovansbrain/wp-content/uploads/... EDIT: Here's the USB 3.1 logo (USB 3.0 logo above for comparison): http://upload.wikimedia.org/wikipedia/commons/4/4c/Usb-3.1-logo.jpg http://upload.wikimedia.org/wikipedia/commons/4/4c/Usb-3.1-l...

PhasmaFelis 12y ago

One step closer to that glorious day when the back of my desktop has like 20 USB sockets and nothing else.