Shenzhen Kaihong Electronic Co., Ltd.  

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Cordless mouse ---Wireless Frequency
2.4GHz devices with the range of 2405MHz to 2.475 MHz
Working channels 16 auto channel hopping
Resolution 800/1.000/1200DPL. Adjustable
Tracking Engine optical USB port 2.0
MAX SPEED 28=inches per second
Optical wireless mouse, effective in 10M, power saving, easy carry
Working voltage: 1.8v-3.4v saving power function low battery indication
Compatible with win95/98/2000/NT/ME/XP/VISTA
3buttons button life: Above 3, 000, 000 times