Features:

• 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