Wireless Technology:2.4G 

Wireless distance: 10m 

Rated voltage / current: 1.2V/20mA 

Power supply: 2 * AAA batteries (not included) 

Number of keys: 6 keys（4 buttons and 1 wheel (middle button)and dpi(adjustable)） 

Optical resolution: 800dpi；1600dpi;2400dpi. 

Work: Photoelectricity 

Button click life: 8 Million times 

Material: ABS