Adesso GP-160UB - Easy Cat 2 Button Glidepoint Touchpad (Black) Downloadable Drivers for Scrolling and Other Features No Moving Parts to Clean or Breakdown USB for PC and Mac Platforms 2-Button Touchpad with Glidepoint Technology by Cirque True Two-Button Mouse Performance Small and portable. Withstands spills and abuse. Thin and comfortable design. One-touch scroll. Both "left" and "right" click functions can be activated by tapping on designated areas of the pad Double-tap and hold your finger on the pad, or hold the left button as your finger glides to grab, drag, and highlight any item on-screen. Edge-extending features make it easy to keep moving the cursor after you've run into the touchpad's edge