Relieve Hand Fatigue- With the latest ergonomic design, the wireless mouse perfectly matches the position of each of your fingers. The mini-contoured shape dramatically reduces muscle tension by 30%. This computer mouse has 6 buttons. Side buttons, forward and back buttons help you navigate the web easily. **USB receiver is stored on the back of the wireless mouse** Wireless Convenience and Freedom- This wireless mouse connects to 2.4G wireless technology via USB receiver Nano (stored on the back of the mouse, next to the battery). The transmission distance is up to 10m/33ft. Just plug and play, no driver needed. Enjoy Your Efficient Life - Choose different DPI computer mice for different needs - 800/1200/1600/2000/2400 (default 1200). For daily life - 800/1200 DPI is enough to meet your needs. For the office, 1600/2000/2400 DPI can significantly improve work efficiency by up to 130%. Long Battery Life X 2- This wireless computer mouse is powered by one AA battery which can last 15 months of battery life. The laptop mouse will enter sleep mode automatically after 8 minutes without any operation. Just click any button to activate the USB mouse. (Battery life depends on the usage situation and device) Durable and Long Lasting Design - Tested with over 5,000,000 keystrokes, the wireless mouse can last long. Widely compatible with Laptops, PCs, Desktops, Computers, Macbook, Chrombook, Notebook. With system, Window 7/8/10/XP/Vista/Linux/Mac. In case of problem, please send an e-mail to LODVIE**ATTENTION: Side button can't work on Mac OS**