?Warranty?Have a free one-year replacement warranty. Professional customer service is on call 24 hours daily to solve your problems. ?Wide Compatibility?Compatible with all Windows system versions, Linux, Chrome OS, and Mac OS. Fits desktops, laptops, PC, Macbooks, Chromebook, and computers. NOT compatible with devices which only have Type C ports?. ?Energy Saving & Environmental Protection?Only 1 AA battery lasts up to 16 months. It enters sleep mode after you leave for 1 minute, double-clicking any button to wake it up. Reduces the need to replace batteries. ?No Delays, No Dropouts?Plug and play, no drivers need to be installed ? ?NOTE: USB receiver is stored in the back of the mouse?. 2.4GHz wireless technology to provide automatic frequency recognition and a stable signal without delay, use distance up to 33 feet. ?Multi-function & Efficiency?Compared with a basic computer mouse, two buttons are added on the side to help you control the forward/ backward page to improve efficiency. With 3 DPI levels (800/1200/1600), choose the sensitivity you need. Durable at 50 million clicks. ? Ergonomic Design, All-day Comfort?The wireless mouse is made of skin-friendly silicone and plastic, safe and non-toxic. The streamlined arc design follows the natural curve of your hand, which can significantly reduce the pressure on your hands, wrists, and arms caused by long-term use.