... high quality silicone materials, the flexibility feel is excellent with quick responsiveness. 4> Made with special materials and durable for usage. 5 ... > With shortcut buttons, such as audio play and so on, the functions are strong.Mouse features: Dimension125x68x37mmNet Weight56 ... batterySystem requirementsWindows98,ME,2000,XP,2003,X64,IBMReceiverUSB 2.0 Wireless Keyboard & mouse combo