Ergonomic 2.4GHz Wireless Vertical Mouse, Rechargeable, BlackThe wrist-friendly contour of this vertical mouse allows you to hold your hand in a neutral “handshake position”, minimizing your forearm muscles from twisting and the possible development of Carpal Tunnel Syndrome. Normally, your forearm muscles are twisted from sitting flat on the supporting surface when using a regular mouse. This “flat position” causes strains on your muscles and leads to wrist pains. This is where this Ergonomic Vertical Mouse become helpful and provide alleviation.Equipped with 6 buttons (Left & Right Click, Back & Forward, DPI Switch, Scroll Wheel) for working or gaming, 1000/1200/1600 DPI Resolution Optical Tracking Technology provides more sensitivity than standard optical mouse for smooth and precise tracking on a wide range of surfaces, and sensitive mouse click with less noise. Built-in rechargeable Li-battery and comes with a usb charging cable so there’s no more money pay for the battery. Stable 2.4GHz Wireless Technology for up to 30’ (10m) working range. Additional Back & Forward buttons provide extra convenience for web page browsing. Compatible with Windows 8/7/10/Vista/XP/2000, Mac (NOTE: The forward and the backward buttons are not recognized on Mac)