The Macally ERGOPALM is an ergonomic vertical wired USB mouse for Mac and PC. This mouse has a DPI button that allows you to switch between a sensor resolution of 800, 1200 and 1600 DPI so you can set the tracking speed and precision to your preference. The 5 soft-click buttons are sensitive and quiet so you can do your job without distraction. The smooth and precise scrollwheel can also be used as a sixth button. Finally, it has Page Up/Page Down shortcut buttons that allow you to scroll conveniently through web pages/documents. The 150 cm (5') long cable allows you to connect the mouse to your Mac or PC (Plug and Play, no driver required), even when it's under your desk. The ergonomic vertical design helps you to reduce palm and wrist strain and increase comfort and productivity. The Macally ERGOPALM works with Mac and PC and is ideal for anyone with Carpal Tunnel Syndrome (CTS) and anyone who is conscious about ergonomics.