EASY AND QUICK INPUT-The scissor-switch key and Bluetooth 3.0 give you a quieter, easier and quicker operation. And the transmission distance is up to 10 M.Long-term operation-Bluetooth numeric keypad has a built-in rechargeable battery.Wide compatibility-Numeric keyboard is suitable compatible with iMAC/Android/Microsoft/PC/laptop, etc.SLIM AND DURABLE DESIGN-slim and portable. And it has 35 keys, which is fully functional. It is a good choice compatible with external numeric keypad.specificationProduct name: Bluetooth wireless keyboardBattery capacity: 250mahInterface: usb interfacecolour: blackMaterial: ABSsize: 145x120x19mmPackage Contents: 1*host1*USB charging cable1*wireless receiverOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.