... . Multiple auto dormancy function, unplug receiver or shutdown, etc, the mouse, keyboard, can get into the deep dormancyquickly ang save batteries well ... . 5. Receiver can automaticly adopt the mouse and keyboard, plug and play 6. MINI inside-type inside receiver ... 98/2000/NT/ME/XP/Vista/windows7/Andriod OS 2012 New !! 2.4g wireless optical mouse