BlueTrack™ Technology: Microsoft BlueTrack Technology combines the power of optical with the precision of laser for remarkable tracking on more surfaces*. 10-Month Battery Life Use your mouse without power interruption for up to 10 months on a single battery. Battery status indicator tells you when battery power is low. Use your mouse without power interruption for up to 10 months on a single battery. Battery status indicator tells you when battery power is low. Plug-And-Go Nano Transceiver The 2.4 GHz wireless USB mini-transceiver connects wirelessly right out of the box with virtually no interference, and up to 10 metres of wireless range. Leave the Nano Transceiver plugged in when you’re on the go, or stow it in the mouse. Leave the Nano Transceiver plugged in when you’re on the go, or stow it in the mouse. Display a 3D overlay of all open windows, and cycle through them. High Definition Optical Technology Customisable Buttons Ergonomic Design High Definition Optical Technology 6+ Months Battery Life Laptop/Notebook Mobile Snap-in Receiver Wireless Technology 3-Year Limited Warranty