NO ON/ OFF SWITCH and Intelligent No Light Power Saving Design: The wireless mouse will enter into power saving mode after 5 minutes free, click left or right button to wake it when you want it to work again. It eliminates the need to change batteries often and the on/off switch is not required. Portable and Durable: A tiny USB Nano receiver (stored within the back of the mouse) conveniently slots into your computer's USB port, and takes up minimal space. Silent buttons up to 3 million clicks. Stable Transmission: 2.4GHz Wireless ensures reliable connection with a long working distance of up to 15m and 250Hz super high speed rate of return that eliminates delays, dropouts and interference. Plug-and-Play and Wide Compatibility: No need to drive, plug and play directly. Work with Desktop, Laptop, Notebook, Computer, PC, Mac, Chrome book and more. Compatible with Windows 2000/ ME/ XP (*64) / Vista, Win7, Win8, Win10 and Mac OS X (V10.4 above). Worry-free After-sales Service: 30 days money-back & 6-months guaranty, when you are not satisfied with our product, please don't hesitate to get a after-sale service, we will give you a satisfied response within 24 hours.