Microsoft Wireless Mobile Mouse 4000 - Graphite
BlueTrack Technology - Works on virtually any surface including granite countertops, carpets, and wood tablesNano Transceiver - Leave plugged in when you are on the go, or stow in mouse4-way scrolling and 4 customizable buttons - Additional advanced features with included softwareUp to 10 months battery life - Battery status indicator lets you know when your battery is running low3-year limited hardware warranty