ETPA Ergo Touchpad Mini USB is a Tiny PS2 Trackpad with a USB adapter, about the size of a postage stamp 1.1 x 1.3 inches 34.80 mm x 28.25 mm, Just plug it in and it works (plug-n-play) All the functions of a standard mouse, right tap in upper right corner left tap everywhere else, Scrolling by dragging finger along right edge, double tap highlighting and drag-n-drop, Glide extend means unlimited dragging, drag your finger to the edge and lift up your finger and continue dragging with the same motion without re-tapping. (Please note there are no gestures or 2 finger controls because of its small size) A favorite of people who take their ergonomics seriously. Fits in places others don't, in between the keys, fantastic with ergonomic keyboards and split keypads. Also used by people with disabilities, R.S.I. repetitive stress injury, accident victims, recommended by physical therapists Thin, Water Resistant, Durable and fast, The Mini USB is the exact same touchpad as the PS2 touchpad but with a special USB adapter Works on PC, Mac, Apple, Linux, all Brands and even Some Tablets .