How to Use: Two connection modes: 2.4G wireless mode, plug the receiver into the USB interface device, you can connect the keyboard, plug and play without driver. In BT mode, the keyboard can be used after connecting BT to the device. Specification: Item Type: Wireless Numeric Keypad Material: ABS Connection Method: BT and 2.4G Dual Mode BT: 5.0 Keyboard Size: Approx. 167.3 x 118.7 x 13.3mm / 6.6 x 4.7 x 0.5in Touchpad Size: Approx. 78 x 110mm / 3.1 x 4.3in Working Distance: 10meters/10.9yd Support System: For iOS, for Android, for Win, for OS X Number of Keys: 22 Keys Working Voltage: 3.0 to 4.2V Working Current with Buttons: <7.5mA Charging Port Type: Type C Charging Time: 3 Hours Charging Current: <1A Standby Current: <1.6mA Sleep Current: <25uA Sleep Time: 30 Minutes Wake up Mode: Button Wake up Battery Capacity: 500mah Lithium Ion Battery (included) Package List: 1 x Wireless Numeric Keypad 1 x Receiver 1 x Charging Cable 1 x User Manual Note: Shipped with Built in Battery