WishLotus&reg; Wireless Ergonomic Mouse High-end Minicute 2.4G Vertical Mouse 800/1600/2400DPI, Left Handed Scientific advanced ergonomic design computer mouse, vertical mice, has natural hand positioning which eases hand and wrist tension. Work in a healthy way. Comfortable and durable. Left hand edition, four buttons. 400/800/1600/2400 DPI, adjustable DPI function. CE, FCC and RoHS certification, 2.4GHz wireless & Laser positioning. Works on virtually any surface. Wireless USB receiver, compatible with Windows 2000, XP, 7, 8, 10, all versions of Windows, Vista, and Mac OS X. 18-month hassle-free warranty. NOTE: Batteries not included; Due to the innovative design of ergonomic mouse, please continue to use several days to get used to it and enjoy the full comfortable.