Specification: Color:Gray,Pink,Blue,Yellow,Purple Power Supply : 1 x AA Battery (Not Included) Size : 105*73*40mm DPI: 1200 Button:2 buttons in default / 1 scroll wheel (middle button) System requirements Operation System: Windows 98/Me/2000/XP/Vista/7Mac OS X+Linux Color: Pink, Yellow, Gray Item: Wireless Mouse Material: ABS Feature: Cute cartoonm design, it is very cute . You can send it for your kids or girl friend as gift. Optical tracking technology, working on many different surfaces and ideal usage for home, office or game. Wireless 2.4 GHz mouse, comfortable touch. Plug and play mode, no need driver The dongle can be stored into the mouse neatly when it is not used Receiver storage space and carrying easily System support: Windows 2000, Windows XP, Windows 7, Windows Vista, Windows 98, Mac OS, Windows ME, Windows 8 Package Included: 1 x Cute Hamster Wireless Mouse 1 x USB Receiver