You can't tell before you buy. Your only hope is requesting a refund and hoping they don't ask you to ship it back. There are so many converter plugs for sale

You can't tell before you buy. Your only hope is requesting a refund and hoping they don't ask you to ship it back. There are so many converter plugs for sale on eBay that are pretty much impossible for their size and price like USB to 3.5mm converters advertised to let you play music from a USB. Somehow I don't think they have a USB controller, DAC, FAT32 driver and mp3 decoder in a little cable sold for $0.70 free shipping.