The new Power Probe ECT3000 Electrical Circuit Tracer is an intelligent short and open finder that makes locating short and open circuits quicker and more accurate than ever before When the ECT3000 Transmitter is connected to an isolated circuit, it will quickly determine if the circuit has an open or if the circuit is shorted The ECT3000 receiver is designed to detect the signal emitted from the transmitter through the vehicles wiring, notifying the user of distance and direction with adjustable height sensitivity Auto Locking Signal Distance Indication from Source Wire Directional Indication to the Short Auto-Shut off of 10 min. Shorted or Open circuit indication Integrated Flashlight in ReceivePower Probe PWP-PPECT3000 – ECT3000 Short/Open Electrical Circuit Tester