Keep moving with a transceiver that stays in your mobile PC when you go and a mouse that works on more surfaces with Microsoft BlueTrack technology! **BlueTrack Technology** Take advantage of BlueTrack Technology, which combines the power of optical with the precision of laser for remarkable tracking on virtually any surface. **Plug-And-Go Nano Transceiver** Leave the Nano Transceiver plugged in when you\'re on the go, or stow it in the mouse. **8-Month Battery Life** Use your mouse for up to eight months without having to change batteries. Battery status indicator tells you when battery power is low. **On/Off Switch** Conserve battery power by turning off your mouse when not in use. **Comfortable in Either Hand** Use your mouse with your left or right hand. Ambidextrous design makes it comfortable either way.