Microsoft Designer Bluetooth Mouse - BlueTrack Technology Support Win/MAC / Android 4.4+ Pointing Device Connectivity Technology: Wireless Pointing Device Wireless Technology: Bluetooth Number of Total Buttons: 3 Package Contents: Designer Bluetooth Mouse 2 x AAA Alkaline Batteries Up to 6-Month Battery life - Use your mouse for up to six months without having to change batteries. Battery status indicator tells you when battery power is low.