1.Ergonomic, Sleek, and Trendy Colors Design: Scientific ergonomic design encourages y neutral "handshake" wrist and arm positions for smoother movement and less overall strain. This could be your choice if you want an ergonomic, colorful mouse; Also, the various color options and the vertical design make it the ultimate choice for home, office, libraries, dormitories, high-speed rail, airplanes, or traveling use 2.High-Capacity Rechargeable Battery: The wireless ergonomic mouse has a built-in rechargeable battery. You no longer need to buy batteries, it is very convenient !! 3 hours of charging can provide up to 150 hours of use. -- One nano 2.4 GHz USB receiver at the bottom of the vertical wireless mouse, Just Plug and Play! NO Bluetooth 3.Multifunction and Convenient: Advanced "Page Back" and "Page Forward" functionality buttons provide convenience when web page browsing. This ergonomic mouse with 800 / 1200 / 1600 DPI Levels -- Easily adjusts the sensitivity of the optical vertical mouse. The left and right buttons are designed with a low-noise quiet click that won't disturb others 4.Widely Compatible: ergonomic vertical mouse is widely compatible with Windows 2000 / XP / Vista / 7 / 8 / 10 / Linux. Note: Not compatible with Mac OS, Apple Products Live smart, Live y, raise your hand into comfort. Once you get used to the carpal tunnel mouse, you will love it so much