[Ergonomic vertical mouse] The scientific ergonomic design allows your hand to be in a completely natural position. It will not twist your wrist like a standard mouse, reducing the pressure on the wrist joint and reducing the risk of cramping$ [Adjustable DPI resolution] 800 / 1200/1600 DPI optical tracking technology, to ensure higher sensitivity than standard optical mouse, can achieve smooth and accurate tracking on various surfaces, automatic energy saving to save energy $ [More functions] The vertical mouse adds a back/forward button on the left side of the mouse, which provides great convenience for web browsing. (Note: Apple computers cannot use the next/previous buttons)$ [Easy operation] Plug and play, no driver is required, just plug in the USB plug and enjoy the vertical mouse directly$ [Wide compatibility] Compatible with Windows7/8/10/XP, Vista7/8 and Mac OS Linux, etc. (Page up/down Button is not valid for Mac OS). Suitable for desktop, laptop, PC, Mac book and other devices.