「Special Ergonomic Vertical Design」Contoured shape of this vertical mouse is very comfortable for right-hand users. Side grip design makes your hand matches the mouse naturally to reduce hand and wrist pain and discomfort for long use.「High Speed Return Rate & Stable Wireless Transmission」250Hz high speed rate of return allows the wireless keyboard and mouse combo to ensure stable and smooth transmission in the 360 degrees within 20 meters without delay and frameskip to enhance your typing experience.「3 Adjustable DPI & Plug and Play」800-1200-1600 3 adjustable DPI provides more sensitivity than regular optical mouse for smooth and precise tracking when gaming, working or studying. The Nano USB receiver is stored in the back of the mouse, no drive needed, just plug and play.「Back and Forward Button」Easy to control the mouse with 6 buttons. The next/previous buttons provide convenience when webpage browsing. It would be a good choice for internet surfers, gamers, students and person who need to work with computer for long.「Universal Compatibility」This wireless mouse works with desktop, laptop, PC, Macbook and other devices which support the USB port. This reliable mouse support 30-day money-back and 6-month worry-free warranty, if there is any problem or concerns, please contact us directly!