Ergonomic, Sleek and Rechargeable Design: Scientific ergonomic design encourages healthy neutral " handshake " wrist and arm positions for smoother movement and less overall strain. ** Most customers find it significantly reduces wrist pain and becomes very comfortable after just a 3-5 day adjustment | Multifunction and Convenient: Advanced " Page Back " and " Page Forward " functionality buttons provide convenience when web page browsing. 3 DPI levels ( 800 /1200/1600 ) -- Easily adjusts the sensitivity of the mouse | High-Capacity Rechargeable Battery: Built-in rechargeable battery. You no longer need to buy batteries, enjoy over 150 hours of continuous use on a single charge, very convenient !! Easy To Use -- One nano USB receiver at the bottom of the mouse, Just Plug and Play! No Bluetooth pairing or drivers needed | Widely Compatible: Widely compatible with Windows 2000 / XP / Vista / 7 / 8 / 10 / Linux. This Lekvey ergonomic mouse is also compatible with Mac OS. Once you get used to the vertical mouse, you'll love it so much and never want to go back to a regular one! | Lekvey Wireless Ergonomic Mouse: Revolutionize your work experience! Are you tired of using traditional mice that strain your wrist? Say goodbye to discomfort and hello to the Lekvey wireless carpal tunnel mouse! Designed with your ergonomic needs in mind, this innovative vertical ergonomic mouse offers a whole different level of comfort and efficiency | Package Includes: 1× Lekvey Rechargeable Wireless Vertical Ergonomic Mouse ( Size: 5.0" x 3.0" x 2.5"; recommended for medium or large hands), 1× 2.4G USB Receiver (in the bottom of the mouse), 1× 150cm Type-C Charging Cable, 1× User Manual. Backed by an industry-leading 36-month manufacturer's warranty