Compucessory Ergonomic Keyboard,USB/PS2 Adapter,19-1/2"x9-3/4"x2",BK/SR Keyboard features an ergonomic design, easy and comfortable to use. Encourages natural hand position. 17 hot keys for one touch control of multimedia, Internet, and other software applications. Enhanced F key function for Windows Office. Built-in duel scroll wheels. Volume control, and three LEDs on palm rest. Hot key functions can be redefined by user. USB with PS/2 adapter. Compatible with Windows 98, ME, 2000, XP and Vista.