Actually the successor to the 4000 is what you are asking for. http://www.microsoft.com/hardware/en-us/p/sculpt-ergonomic-desktop/L5V-00001 http://www.microsoft

Actually the successor to the 4000 is what you are asking for. http://www.microsoft.com/hardware/en-us/p/sculpt-ergonomic-desktop/L5V-00001 http://www.microsoft.com/hardware/en-us/p/sculpt-ergonomic-d...