AZIO KB351RT Compact Size RF 2.4G Wireless Keyboard with Trackball, USB

Multimedia Keyboard with Trackball
The AZIO KB351RT has built-in 12mm diameter trackball pointing device with left-hand mouse buttons, 7 multimedia keys (Back Track, Next Track, Play/Pause, Stop, Vol+, Vol-, and Mute) and 3 Internet hotkeys (HOME, EMAIL, and BACK) -- all in a slim, elegant and small form-factor design, making it the perfect handheld HTPC or Multimedia PC input device.
2.4 GHz RF Wireless Technology
2.4GHz RF wireless technology delivers reliable wireless connection and superior operating range up to 33 feet for the ultimate wireless freedom.
Scissors Keycap
Scissors keycap architecture makes typing silent, responsive, and comfortable.