Microsoft Wireless Mobile mouse 3500, USB, ER, English, White/Flowers, Retail The Microsoft Wireless Mobile Mouse 3500 helps you keep moving with a transceiver that stays in your mobile PC when you're on the go, and a mouse that works on more surfaces with Microsoft BlueTrack Technology. Features Microsoft BlueTrack Technology, which combines the power of optical with the precision of laser for remarkable tracking on virtually any surface. Leave the plug-and-go nano transceiver plugged in when you’re on the go, or stow it in the mouse 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 helps you conserve more battery power by turning your mouse off when not in use Use your mouse with your left or right hand — ambidextrous design makes it comfortable either way