Description:By using a transmitter and receiver, this circuit breaker finder quickly and easily identifies individual branch circuits at the panel box without interrupting power. It is the best way to accurately locate circuit breakers. They are compact in size and extremely easy to use.Features:Quickly and easily identify correct circuit breaker or fuse, protecting a specific electrical circuit.Sensitivity can be adjusted through the ON/OFF switch.The operator can determine the status of circuit connection according to the 3 LEDs.Features visual flashing light and an audible beeping to alert you when the correct breaker is identified.Professional tool for house, office, factory power network reconstruction, etc.Specification:ReceiverTypeUT25A / BOperating Frequency50-60HzPower Supply1 x 9V Battery(Not Included)Operating Temperature5-40Storage Temperature-20-60TransmitterOperating Frequency50-60HzFuseReceiver Size(appr.)19 x 5 x 3cm / 7.5 x 2.0 x 1.2"Package Weight(appr.)262g Package Included:1 x Circuit Breaker Finder (Receiver)1 x Socket Tester (Transmitter)1 x User Manual.