Anyone who works in HVAC, automotive, or who services units with low voltage will want to add the 12-24 AC/DC Breaker Blaster to their tool box. Users can trace and verify circuits by connecting it to the positive and negative sides of the circuit they wish to trace or verify. Move quickly from circuit to circuit with the insulated alligator clips. The same, high decibel tone used in the 120 VAC Breaker Blaster and Lamp Blaster is also used in the 12-24 AC/DC Breaker Blaster. This allows users to verify and trace circuits from a great distance. Economical pricing and a compact design makes it a winner!