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 Microsoft BlueTrack Technology 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 without power interruption for up to 8 months on a single battery. Battery status indicator tells you when battery power is low. ON/OFF switch Conserve more battery power by turning your mouse off when not in use. Comfortable in Either Hand Use your mouse with your left or right hand—ambidextrous design makes it comfortable either way. Designed for Notebook PCs Compact and comfortable, our handy notebook and laptop products are designed for convenience and mobility.