Take out the mouse, INSERT the USB, and click away. Your connection stays strong with the 2.4 GHz USB receiver. And when you’re done, dock the receiver in the mouse itself Long hours are no match for this well-designed mouse. The Lenovo 400 Wireless Mouse is ergonomically sculpted to keep you comfortable even on days you’re burning the midnight oil The Lenovo 400 Wireless Mouse meets our rigorous test standards and is a sure bet, with a battery life of up to 12 months and left/right buttons that last up to 8 million clicks Supports Operating Systems above Windows 7 Take out the mouse, INSERT the USB, and click away. Your connection stays strong with the 2.4 GHz USB receiver. And when you’re done, dock the receiver in the mouse itself Note In case of Wireless mouse, the USB receiver will be provided inside or along with the mouse Long hours are no match for this well-designed mouse. The Lenovo 400 Wireless Mouse is ergonomically sculpted to keep you comfortable even on days you’re burning the midnight oil The Lenovo 400 Wireless Mouse meets our rigorous test standards and is a sure bet, with a battery life of up to 12 months and left/right buttons that last up to 8 million clicks Supports Operating Systems above Windows 7