You are looking at the world’s first ergonomic, fully integrated USB 2.0 video magnifier. Distributed in over 37 countries Worldwide and supplied via eye care professionals and resellers, the Bierley MonoMouse-USB(TM) is the choice of computer users. - Plug the end of the MonoMouse-USB(TM) cable in to your PC or laptop (with software installed) - Enjoy the sharp image .....