Targus Targus Wi-Fi Laser Mouse - Black (AMW58US) Windows 7 compatible only Connects using computer's Wi-Fi receiver; integrated four-way scroll wheel allows you to scroll horizontally and vertically High-precision laser senor allows for accurate performance on almost every surface Supports Windows 7 task switching with the touch of one button The mouse comes equipped with two high-quality Energizer batteries and is designed to provide up to 12 months of battery life depending on usage Unit Dimensions: 3.25L inch x 2.25 inch W x 1.0 inch H