[Delux Ergo Vertical Series Mouse] It is important to equip with the correct size vertical mouse, which let you easily get used to the use of vertical mouse, and more help dramatically comfort hands muscle. Every people have different hand size and there is no one size fitting all. Do not worry, you could find your correct size vertical mouse with Delux Ergo Vertical Series, even for left handed person.Just find your correct one according to your Palm size. [New Ergo Holding Gesture57?] Just hold the Delux vertical mouse with scientific angle57 degree, rest your hand in mouse and keep your forearm muscel under natural position. Compared with traditionshaped mouse, reduce arm discomfort and hand stiffness. [Plug and Play, Stable 2.4G Wireless] 2.4G RF wireless connection with USB Nano Receiver, with 10m/30ft efficient distance, just plug and play (please note that due to simple design, the USB Nano receiver stored in the battery compartment, please find the USB receiver in the battery compartment ) [3 Adjustable Dpi]: 10001200(default)1600, 3 Gear DPI which would be easily shift according to your daily working requirement by the DPI button behind the scroll wheel. Fits for different devices, Laptop, PC Computer, Notebook, Macbook(limited supports to Mac, the side button are not available for Mac) (Compared with traditional mouse, with unique ergonomic vertical design, it may take a few days to get used to using it)