Logitech M187 Cordless Mini Mouse - Red/Grey (910-002721) The pocket-size mouse thats big on wireless reliability. Goes wherever you go: You can take the Mini Mouse wherever you take your laptop - thanks to its pocket-ready, extra-small design. Free yourself: The tiny nano receiver stays in your USB port - and lets you enjoy the freedom of wireless with more precision and control than your laptops touchpad. Confident connection: Enjoy the reliability of a cord with the convenience of wireless - thanks to Logitech Advanced 2.4 GHz wireless technology. Controller Features: Wireless, Zooming Capabilities, USB Connection Wireless Technology: Wireless USB Operating System Compatibility: Windows XP, Windows 7, Windows 8, Mac OS X 10.6 Snow Leopard, Windows Vista System Requirements: USB Port Includes: Operating Instructions, USB Receiver, M187 Mouse, AAA Battery (pre-installed) Dimensions: 3.15 " L x 1.97 " W x 0.98 " T Weight: 1.8 Oz. Warranty Description: 3 Year Limited Warranty Battery Required, (included, pre-installed): 1 AAA Enjoy a new level of control over your laptop with a cordless mouse from Logitech. The 2-buttoned mini mouse has a small design to make it portable yet maintain the same function of a standard-sized mouse. Works via a wireless dongle that plugs into the computer's USB port. The plastic mouse is battery powered. Wireless receiver dongle is powered through its connection with the computer.