Microsoft - Wirelss Notebook Bluetrack 6000 Mobile Mouse (Black)

Take advantage of BlueTrack Technology, which combines the power of optical with the precision of laser for remarkable tracking on virtually any surface.Leave the nano transceiver plugged in when you’re on the move, or stow it in the mouse.Use your mouse for up to eight months without having to change batteries. Battery status indicator tells you when battery power is low.Enjoy the 2.4-gigahertz (GHz) wireless technology, which delivers a reliable connection with up to a 9-metre/30-foot range, with virtually no interference.Your mouse will work anywhere you do—including granite, carpet and rough-grain wood.