Product Description:

The Mastech circuit breaker tester identifies circuit breakers on energized electrical systems. Automatic sensitivity adjustment and automatic polarity selection remove ambiguity about readings. The tester indicates the presence of a circuit breaker with a buzzer and an indicator light. The tester includes a transmitter, which is plugged into an electrical outlet, and a receiver, which is powered by a 9V battery.  

Package list:

1 * Socket Tester with Transmitter

1 * Circuit Breaker Finder with Receiver