2.4 GHz Wireless Technology - Strong and stable wireless connection at distances of up to 10 meters Battery life up to 12 months - Works for up to a year without needing to change the batteries. To extend battery life, use the power button to turn off the mouse when not in use - Battery life may vary slightly depending on equipment conditions and mouse usage Comfortable and portable - The shape of the mouse provides comfortable support for the hands Dimensions Height x width x depth: 97mm x 61mm x 35mm Weight: 70.5 g without battery System requirements Windows® 7, Windows 8, Windows 10 or later Mac OS® X 10.8 or later Chrome OS ™ Linux® Kernel 2.6+ USB port Battery: 1 AA battery