ERGO MOUSE: Natural ergonomic vertical with right-handed design. Our 6-button mouse increases your productivity. Recommended to repetitive strain injuries RSI user and user works particularly long periods on the computer. 3 DPI LEVELS: Optical sensor for accurate navigation. Mouse sensitivity can be changed with the DPI control button. Adjustable 3 DPI levels of the 800/ 1200 (default)/ 1600 WIRELSS FREEDOM: Wireless 2.4GHz ergonomic vertical mouse provides up to 10 meters operation range. Nano USB receiver with storage compartment, easy for you to store your USB. POWER-SAVING: Built in power on/off switch button and power saving function. Two AAA batteries needed (batteries are not included in the package) COMPATIBILITY: Windows 10/ 8/ 7/ Vista/ XP/ 2000, Linux and Mac OS. Package includes 1 wirelss mouse, 1 USB receiver, 1 user manual