Dual Modes: This wireless number pad with touchpad features both BT and 2.4G connectivity for a fast and stable connection. Wide Compatibility: Compatible with Win, iOS, Android, and OS X systems. Integrated Touchpad: Enjoy enhanced control with the built-in touchpad. Portable Design: Compact and lightweight for easy carrying and use on the go. 500mAh Battery: Powered by a built-in 500mAh battery, offering a transmission distance of up to 10.9 yards. Item Type: Wireless Number Pad Material: ABS Supported Systems: iOS, Android, Win Keys: 22 keys Wireless/BT: Nordic (nRF51802) BT + 2.4G dual modes BT Version: BT 4.2 Key Lifespan (number of keystrokes): 5 million Response Time: 30 MS Wireless/BT Transmission Distance: Approx. 10 meters / 10.94yd Working Current/Voltage: 1mA/3.7V (Typing) 7mA/3.7V (Touch) Built-in Lithium-ion Battery Capacity: 500mAh (Battery included) Charging Time: 3 hours Charging Port Type: Type-C Usage Time: More than 6 hours Standby Time: >6 months