Super easy installation: plug & play. Just insert an AA battery (NOT included) and plug the nano receiver into your computer. (The USB receiver is on the back of the mouse.) No drivers are required. Quiet Click & 2.4GHz Stable Connection: Elegant design and responsive buttons, offers a very soft click with little noise. 2.4 GHz wireless transmission technology provides a powerful and reliable connection up to 10m. Universal Compatibility: Perfect for Windows XP, Windows Vista, Windows 7, Windows 8, Windows 10, Mac OS, etc. Automatic energy saving mode: This mouse does NOT have an on / off switch. However, you don't have to worry about the high power consumption problem. The mouse will automatically switch to power saving mode after 10 minutes of inactivity. During this time, the mouse consumes almost no electricity. Then you can press any mouse button to activate the mouse and start working.