Yunseity Wireless Numeric Keypad

Specification: Item type: 22 key numeric keypad Material: ABS Optional color: black silver/iron grey/rose gold Support system: for , for WIN, for Mac OS Number of keys: 22 keys Wireless support: 2.4G wireless Keyboard life (keys): 3 million times Response speed: 5 milliseconds Compatible with transmission distance: approx. 10 m/32.8 ft. Working Current/Voltage: 0.25MA 3V Battery Type Capacity: 2 x AAA (not included) Working time: 80 hours Package List: 1 x Keypad (Battery not included) 1 x user manual (English language not 1 x receiver.