CM840B, Bluetooth mice

3D Bluetooth mouse 
Bluetooth3.0 connection
Size: 98.7*64.1*34.3mm
Rubberized top with brushed finish
8-10m working range
High resolution: 800/1200/1600 DPI
Press the left and middle buttons simultaneously to switch dpi
Auto power saving mode
Working current: less than 10mA
Work on most surfaces
With 1X AA alkaline battery and blister packages