Store the USB receiver in the compartment under the mouse for mobility. Not only that, it autiomatically turns off the mouse to prolong the battery life. The battery can be recharged via included USB cable. The 2.4GHz receiver is RF technology and have 16 channels which increases operating range and minimizes interference. Features: System Requirements - Windows 2000, Me, XP, USB Port Weight - 4.2 ounces |