Brand: Ergoguys. MPN: WP-012-BK-E. The Wow Pen Joy II Wired Vertical Ergonomic black Optical Mouse combines break-through comfort with a host of productivity enhancing features unlike any mouse on the market today. It isn't just another mouse, this Pen Joy II wired optical mouse is a revolutionary jump forward in computer input devices. Comes with a 6' cord for maneuverability. Works with most USB connections. 6 mouse buttons: Right, Middle and Left Click. Forward, Backward and DPI changer. DPI is adjustable to 800, 1200 and 2000. Compatibility with PC, Mac, and Linux.