
From the website:
Take the guesswork out of finding circuit breakers with the circuit breaker detective
Plug the circuit breaker detective's transmitter into the circuit you want to find, go to the breaker box and the receiver identifies the correct breaker. The unit features a flashing arrow indicator and digital calibration for faster, easier and more reliable performance. The auto shutoff feature saves battery life.
Flashing arrow indicator for easier identification
Digital calibration for faster, easier, more reliable identification
Fully automatic
Manual and automatic shutoff