Ergonomic Design: UGREEN ergonomic wireless mouse fits nicely in hand, comfortable to use. Fingers rest and carving art provide extra grip, and comfort to rest the palm even for hours. Side back/forward buttons for convenient browsing. Precise and Responsive Tracking: With 4000DPI, 5 level of adjustable settings, the UGREEN laptop mouse wireless delivers smooth navigation and precise cursor control, action instantly without annoying delay. Silent Click and Scroll: UGREEN Silent Wireless Mouse reduces 90% of click sounds, creating a quieter environment. The Noiseless Mouse is suitable for offices, homes, libraries, cafes, and airplanes. Stable Wireless Connection: UGREEN USB 2.4G Wireless Mice adaptors 2.4G wireless tech, ensuring a 15m/49ft wireless connection range without dropout frequently. Plug and play on Windows 11/10/8/7/XP, Mac OS, Linux, and Chrome OS. 18-Month Battery Lifespan: With one AA Battery (Not Included), the Mac Wireless Mouse realizes an 18-month battery life. Besides, this USB Silent Mouse automatically goes into auto-sleep mode with no operation after 3 seconds.