ACK540UB 88 Key Mini Keyboard with Touchpad - Black w/ USB Interface 88 key mini portable keyboard with touchpad built-in POS keyboard with mouse functions, perfect for rack mount or cash register applications. Compatible with Windows 98, ME, 2000, XP, Vista, 7, 8 and 10 Built-in Glidepoint Touchpad with 4 way scrolling (Up/Down/Left/Right) USB Interface