TopScan ProPocket Size Bluetooth Scan Tool w Bi Directional Controls The TopScan is a powerful, pocket sized tool that transforms your smartphone into a full featured OBD2 scanner, ideal for diagnosing and clearing fault codes. Compatible with over 70 vehicle makes from American, Asian, and European manufacturers, its an essential tool for dealing with check engine lights and other diagnostic needs. Simply connect the TopScan to your vehicles OBD2 port and use