Come and see our amazing products. 4 levels DPI: 800/1000/1200/1600. Comfortable Ergonomic DesignAfter thousands of samples of palm data we designed this ergonomic mouse. The mouse has a streamlined arc and thumb rest to help reduce the stress caused by prolonged use of the mouse. The side pits help reduce slippage and maximize your feeling of use. Well compatible with Windows7/8/10/XP Vista7/8 and Linux etc. Powered by 2AAA battery (not included) Pls confirm further with us if any query about packing info, inventory status and time schedule.