microsoft mobile wireless mouse 3500 purple
bluetrack technology allows tracking on many surfacesadvanced optical technology allows use on more surfaces than either an optical or laser mouse . with microsoft bluetrack technologytm the mouse can track on surfaces like granite countertops carpet or even rough wood . does not work on clear glass or mirrored surfaces . 2.4 ghz wireless provides range up to 15 . compact nano transceiver can stay connected to your notebook computer when you travel . battery typically provides up to 8 months of use . power status indicator lets you know when a replacement is needed .