Macally BTMOUSE Bluetooth Full Size Mouse 2 AAA rechargable batteries, Charging cradle and AC adaptor included Auto sleep mode when computer shuts down Easy to install and use Ergonomically designed for enhanced comfort System Requirements - Any desktop or portable computer with a built-in Bluetooth module or an external USB Bluetooth adapter, MacOS 10.2.8, 10.3.x, 10.4.x and above, Windows 98, Windows 2000, Windows ME or Windows XP