2.4GHz Portable RF Wireless Keyboard with Trackball Mouse 600M-BRF
Keys: 78 Keys (U.S English) with 36 hot keys
Size: 27.2 (L) x 11.0 (W) x 2.65 (H) cm
With built-in trackball as optical mouse: 800 dpi
Interface: USB (receiver)
Operating Frequency: 2.4GHz radio frequency
Operation distance: about 10M
Operation current: 10mA max.
Keyboard: 10mA max.
Mouse: 20mA max.
Receiver: 100mA max.
Battery needed: 2 X AAA batteries
Compatibility: Windows 2000, XP, Vista & 7
Function: Fn & Num Lock keys combination function