Ergonomic, Antimicrobial, and Wireless Mouse. With the specially designed vertical shape, the Adesso iMouse A20 provides a uniquely comfortable ergonomic mouse experience. Buttons are conveniently located on the side allowing for intuitive control and faster back and forward browsing. The switchable DPI (1000/1600/2400) provides for two levels of control. The iMouse A20 is plug and play and requires no drivers. The vertical design provides better support for your forearm minimizing wrist pain that can come from twisting. With 2.4 Ghz RF wireless technology you can enjoy working at any angle and at a distance of up to 30 feet. Made with antimicrobial material which prevents the growth of harmful bacteria and protects against the build up germs between washings. Provides responsive, smooth cursor control and precise tracking and easy text selection thanks to high-definition optical tracking (1000/1600/2400 DPI). Optical sensor technology improves precision and even lets you work on most glass, wood, marble and leather surfaces without a need of mouse pad. Both PC and Mac compatible.