Microsoft Wireless Mobile Mouse 4000 - Ocean Teal Blue BlueTrack Technology - Works on virtually any surface including granite countertops, carpets, and wood tables Nano Transceiver - Leave plugged in when youre on the go, or stow in mouse 4-way scrolling and 4 customizable buttons - Additional advanced features with included software Includes video effectsUp to 10 months battery life - Battery status indicator lets you know when your battery is running low 3-year limited hardware warranty