With the Express Mobile from Square Wheel Industries, all lighting functions and the air brake system, including brake adjustment, can easily be checked in just two minutes, start to finish. The Express Mobile works by radio remote-controlled air brake operation, in addition to a complete built-in electrical system scanner. The scanner function allows testing of lighting in sequence (left/center/right) to help isolate shorts or improper wiring. The remote control function turns ‘walk around time' into productive diagnostic time.