. 83 keys+ 2 mouse hot keys +built -in trackball mouse
. 2. 4ghz wireless radio frequency technologis
. up to 20 meter (66ft) remote control range
. laser printed keycaps
. light wight and elegant design
. Dimensions: 266.2 x 127.1 x 16.8 mm (10.4" x 5" x 0.66")
. System requirement: Windows 95/98/2000/Me/XP/Vista/Window 7
