Built with the same easy-to-use and economical design as the Breaker Blaster and Lamp Blaster, this tool rounds out the collection for a residential or commercial electrician. The 240 VAC Breaker Blaster from GTi Products is designed to trace and verify circuits from 100 to 240 VAC . Attach the insulated alligator clips to the positive and negative side of the circuit to be traced, a loud audible signal designed to penetrate walls verifies live circuitry and can be heard from great distances.