¡¾Ergonomic Optical Mouse¡¿this ergonomic mouse is innovative and has many health benefits. The optimized ergonomic shape supports the hand and prevents mouse or tennis arm (RSI). It puts your wrist in a natural "handshake" position which can effectively reduce pain and discomfort by changing the way you use your wrist and arms(2*AAA,Not included) ¡¾2.4G & Bluetooth Connection¡¿With dual Bluetooth and 2.4G technology, our wireless Bluetooth mouse can connect up to 3 devices, just switch by pressing the mode switch button. ¡¾3 DPI Adjustable¡¿This vertical mouse is quiet with 1000/1600/2400 DPI levels and meets the demands of gaming or work and performs smoothly when working on any surface ¡¾Multifunction Buttons¡¿Our forward/backward buttons added to the computer mouse provide comfort when browsing web pages. (Note: Front/Rear does not support Mac systems) ¡¾Wide Compatibility¡¿Our wireless mouse is compatible with Windows XP,7,8,10 or Mac OSx10.10, Andriod 4.3 or above. Suitable for PC, laptop, mobile phone, Macbook, iPad Pro, etc. Note: Mouse function is only supported from iOS 13.