Switch between devices instantlyAdjustable 1600 DPI sensorSilent clickingUp to 12 months of battery life3 connectivity modes: 2.4 GHz, Bluetooth 3.0, Bluetooth 4.0Bluetooth pairing buttonDPI switchOn / off switch2 AA batteries includedNano USB receiverStorage space for the nano USB receiverSystem requirements: Windows XP / Vista / 7/8/10; USB port