Frequency: 2.4GHZ
Chipset: RF surplus 2421 + sensor A7530
With mini USB receiver
Lower power alarm with LED light
Build-in memorizer, no need re-set code when you change new battery
Power: 5V, 10mA maximum, 2 x AAA batteries
800DPI high resolution
Operating coverage: 10 meters
Working on any surface except glass and mirror
Compatible with Microsoft Windows 2000/XP/9X/ME/NT4.0, also compatible with windows vista