Minimize forearm and wrist pain during long workdays or marathon gaming sessions with the Adesso iMouse E1 Vertical Ergonomic Wired USB Mouse. Ice Blue illuminated light adds a touch of style, and will help to increase visibility in dimly lit environments. You can also easily adjust the DPI resolution, thanks to the DPI switch located next to your thumb, and browse the Internet with ease, thanks to the backward and forward navigational buttons on the left side of the mouse.