Feature:- Ergonomic shape and soft rubber handles to fit your hand and feels naturally comfortable.- optical sensor, high sensitivity compared to other conventional optical mice, sampling rates 1000 - 1600 dpi (freely selectable with DPI selector switch), precise operation on almost any surface.- 6 keys & scroll wheel, left & right mouse button, forward & back button CPI button provides optimum comfort while surfing the Internet | easy-to-use buttons and scroll wheel.- Avoid possible mouse arm or tennis elbow (RSI syndrome), the right choice for Internet surfers and for people who work long hours on the computer every day.- Improved handling compared to conventional mice- For Microsoft Windows XP / Vista / 7/8 / Windows 8.1 (32- and 64-bit) / Windows 10 (32- and 64-bit), MacOS and Linux.Specification:Material: ABSKeys: 6 keysButtons: left, right, scroll wheel, DPI button, forward, backward,Key life: 800 million timesType: WirelessDPI: 800-1200-1600 DPIPackage included: 1 x Vertical Mouse