Description:Compatible with: IOS system， Android system，windows systemColor: black，whiteBattery: Lithium Polymer 150mAhWorking Current: 2.5mAh-3.5mAhSleeping Current: &amp;lt;0.2mAhworking voltage:3.7-4.2V<br>Convenience keyboard design<br>Pacakge includes:1 x Bluetooth keyboard