UGREEN 2.4GHz Ergonomic Vertical Mouse, 4000DPI Optical Tracking, 57 Angle, 6 Buttons, 12-Month Battery Life, 4 Adjustable DPI Levels Wireless Silent Mouse for Laptop, Desktop, Macbook

57 Degrees for a Straight Wrist: The vertical body holds your forearm, wrist and palm in a natural handshake position instead of a flat twist, easing the wrist ache a standard mouse builds up by the end of a working day 4000 DPI Tracking on Real Desks: The 4000 DPI sensor was tested on dark cloth mouse pads, plain paper, laminate, marble, metal pads and wooden desks, so the cursor keeps up on the surfaces you actually work on. (Note: Not suitable for glass surfaces.) Back and Forward Under Your Thumb: The thumb-side buttons page through web pages and documents without a trip to the menu - instant on Windows, while on macOS they switch apps instead (fullscreen required). (Note: Middle-click is unavailable on macOS, Linux and iOS) A Year on One AA Battery: Up to 12 months per cell, and the mouse sleeps when you step away so idle desk hours don't eat into it. When the year is up, a spare AA costs pennies - no cable, no charging wait (Note: AA battery not included.) Built for Medium to Large Hands: Sized for right hands with a hand length over 17.5 cm, the body supports your full palm so your hand stays relaxed instead of cramping up by the end of the day. Measure before ordering for the right fit first time