Cuifati Wireless Numeric Keypad

How to use: Plug and play Specification: Item Type: Wireless Numeric Keypad Material: ABS Supported systems: for iOS, for Android, for Win Key: 22 keys Wireless/BT: Nordic(nRF51802) BT + 2.4G Dual Mode BT Version: BT 4.2 Keyboard life (pressure times): 5 million Response time: 30 MS Wireless/BT: Transmission distance: approx. 10m / 10.94yd. Operating current/voltage: 1mA/3.7V (typing) 7mA/3.7V (touch) Built-in lithium battery capacity: 500mAh (battery included) Charging time: 3 hours Charging Port Type: Type C Using time: more than 6 hours Standby time: >6 months. Package List: 1x Wireless Numeric Keypad1 x Charging Line 1 x 2.4G Receiver 1 x User Manual