[Vertical Series] It's crucial to find the right size vertical mouse for comfortable use and to alleviate hand muscle strain. Hand sizes vary, so there's no one-size-fits-all solution. The DELUX Ergo series offers a variety of sizes, including options for left-handed users. [New Ergo 57° Grip] The 57-degree angle promotes a natural hand and forearm position, reducing discomfort and stiffness compared to traditional mice. [Plug and Play, Stable 2.4G Wireless] 2.4G RF wireless connection with a USB nano receiver offers a 10m effective range. Simply plug and play (note: the nano receiver is stored in the battery compartment). [3 Adjustable DPI] 1000, 1200 (default), 1600 DPI settings are easily switched using the button behind the scroll wheel. A sensitive optical engine ensures smooth and precise tracking on various surfaces. [Wide Compatibility]: Compatible with Windows 7, 8, 10. Works with laptops, PCs, notebooks, and MacBooks (Mac compatibility: side buttons may not function).