A range of functions allow automotive electricians and mechanics the ability to effectively diagnose short circuits and bad earths. The 4.6m lead connects to a 12V battery supply and reaches to all areas of the vehicle. Fly lead allows continuity and polarity testing with a high-contrast LCD display with 9mm high (3V to 42V) read-out. Activate components in situ or prior to installation. Features audible and positive/negative voltage indicator plus two integral worklights. Kit includes three probe extension leads, two wire piercing probes, two lead adaptors and a crocodile clip. Supplied in a storage case.