Adesso Smart Cat, 4 Button Glidepoint USB Touchpad (GP-410UB) Extra-large touch surface. Four mechanical buttons supported. One-touch scroll, zoom and surf. Withstands spills and abuse. Quickly activate vertical/horizontal scrolling as well as magnification tools by gliding a finger along the touchpad edges. Right-clicks are accessible by tapping a finger in the touchpad's upper right corner. The Adesso Smart Cat sets the standard of comfort plus performance in computer control.