Ergonomic, Sleek, and Trendy Colors Design: Scientific ergonomic design encourages healthy 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 | 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. Easy to Use -- One nano 2.4 GHz USB receiver at the bottom of the vertical wireless mouse, Just Plug and Play! NO Bluetooth | 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 | Widely Compatible: Lekvey 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 healthy, raise your hand into comfort. Once you get used to the carpal tunnel mouse, you will love it so much | Note Before Purchasing: This ergonomic mouse measures 5.0 x 3.0 x 2.5 inches. 95 g / 0.21 lb. (Please Note: The wireless vertical mouse is not suitable for small hands, it is larger than traditional mice, and there is no light on the side). Energy Saving -- The wireless ergo mouse enters sleep mode after 20 minutes of inactivity, click any button and wait for 3 seconds to wake it up