Vertical Ergonomic Design -- eases tension on the wrist and hand, helps you to keep away from carpal tunnel syndrome. High Control -- non-delay technology allows high sensitivity, provides up 800/ 1200/ 1600 3 levels of adjustable DPI, you can make it more precise for things, like color correcting and photo editing, or faster for browsing. and Feeling -- made of material feels like human skin, gives users the most comfortable hands feeling and avoids from sweat and slipping. Long Time Use -- built-in rechargeable lithium battery, low power consumption, can be used for up to half a month after fully charged. 2.4GHz Wireless Control -- no messy wire, wireless transmission can operate up to 10 meters. Compact and Portable -- light, simple and modern design, easy to carry, suitable for game, home, office, net bar, etc. Wide Compatibility -- plug and play, fit well with most desktops or laptops with a USB port for connection.