●?? 【2.4G Wireless】The numeric keypad uses the latest 2.4GHz wireless technology,plug and play, no delay and caton, fast data transmission , and working range is up to 33 ft. ●?? 【long battery life】The number keypad built-in high-capacity lithium batteries with 250mAh, the working time of the keypad has more than 40 hours when fully charged. ●?? 【Auto sleep function】The numeric keypad will go into sleep mode auto to save power and energy when not in use.Press any key can wake up the keypad within 2 seconds. ●?? 【35 keys Multi-Function】: Number keypad is designed with 35 keys, compact structure, but full featured, efficient and shortcut function keys, improve work efficiency. ●?? 【Widely Compatibility】: Number keypad widely compatible with Windows/macOS/linux, work with your smart phone, laptop, desktop, tablets, MacBook Pro/Air, MacBook Mac Mini.