This Esperanza Optical Mouse will be your best companion for all your computing needs.
The mini wireless receiver can be stored in the mouse to prevent loss, and it is convenient for use during traveling.

Specification
800/1200/1600DPI resolution
Radio Frequency: 2402MHz-2480MHz
Range: 10m
Powered by AAA*2 batteries(battery not included)
Receiver interface type: USB 2.0
Power saving module designed
System compliance: Windows 98/Me/2000/XP/Vista/7, Mac OS 8.6 and above.