Shake hands with your mouse. The Pro Fit® Ergo Vertical Wireless Mouse, with its natural handshake position, improves wrist posture for better comfort. In an independent study conducted by professional ergonomists*, “users rated the vertical mouse as the most comfortable and that it conformed to their hand naturally.” * Source: 2019 VSI Risk Management and Ergonomics, Inc. study. Contoured, natural (46.7 degree) slope keeps the wrist in a neutral handshake position, eliminating soft tissue compression. An extended lip for the little finger provides complete support for smoother, larger muscle group movement. Fully-featured mouse with scroll wheel, left, right, forward, back, and DPI (800/1000/1200/1600) buttons. Simply plug in the nano receiver for plug & play wireless connectivity up to 20 meters. A low battery indicator lets you know when it’s time to change the battery, so you’re never caught off guard. One AA battery lasts up to a year. Nano receiver conveniently stores inside mouse when not in use. In an independent study conducted by professional ergonomists*, “users rated the vertical mouse as the most comfortable and that it conformed to their hand naturally.”*** Source: 2019 VSI Risk Management and Ergonomics, Inc. study. Optimised for your Windows 11 mouse needs.