Qisan(TM) 2.4GHz Wireless Mouse 1000DPI Matte Surface Optical Mouse with Nano Receiver (in the battery storage) - Red 2.4G Hz Free moving in 10 meters (30 Feet) An On/Off switch and smart sleep mode help conserve power, while its battery indicator light eliminates surprises. Works with basic PC, Windows XP, Windows Vista or Windows 7 Package List: 1 x Wireless mouse(Not including battery), 1 x Nano receiver(in the battery storage)