✅Unique Ergonomic Design The unique ergonomic shape closely supports your palm, the proper vertical design that keeps your hand and arm staying more naturally. Effectively reduces the wrist strain and pain, compared with a regular mouse. (Note: it is right-handed mouse) ✅Large Size This ergonomic mouse size is Great for Large hands/Men's hands, may be NOT very comfortable to Women or Small Hands. It may take several days to get used to. If it does not fit your hand well, ✉contact us for refund without any hassle at any time. ✅3 Different Sensitivity 800/1200/1600 DPI, switched by DPI button. Built-in rechargeable Li-battery. The mouse works while charging. 2.4G wireless connection, no wire hassle. ✅Easy to Use Plug and play. Compatible with Windows 8/7/10/Vista/XP/2000, Mac, Linux (NOTE: Both forward and backward buttons are not recognized on Mac). ✅Customer Service at AUTLEY, [90 Day Money-back Guarantee], [1-Year Warranty(replacement service)], [Lifetime Technical Support]. If you are not satisfied with this item, ✉welcome to contact us for help ([email protected]), get free replacement/refund without hassle at any time, no need to return.