Vertical USB Mouse Black

[Rapid Responsiveness] Optical tracking tech. allows higher sensitivity for extra-precise tracking. 2.4GHz wireless tech. enables it work in a superior fast way. One button switchable between DPI levels 800, 1200, 2000, 3200 to adjust cursor speed to suit various usage scenario, [Upgraded Functionality] Previous and next page buttons for hi-speed web, files browsing and work flow, perfect for gaming enthusiast, programmer, office staff, teen Internet surfer and people who sit at length at computer, [High Compatibility & Quick Access ] This vertical optical mouse works greatly for Mac OS X, for Linux, for all versions of Windows OS and more. Plug-and play, simply plug it into a PC USB port, it works in a in ultra high efficient way, [Automatic Sleeping Mode] It'll automatically enter sleeping mode after long time inactivity or power failure. Click any button to wake it up at any time. Energy-efficiency and security