HP 920 Ergonomic Wireless MouseA more natural fit. A more comfortable workday. From login to logoff, your every move matters. Your comfort matters too. The HP Ergonomic Vertical Mouse is designed to keep your hand in a more relaxed, natural upright position as you click, drag, and scroll through your day. Whether you're grinding on a project, editing vacation photos, or handling the day-to-day, you'll and even more comfort with the unique, detachable wrist rest.