?OPEN SHORT CIRCUIT FINDER TRCING WIRE?VDIAGTOOL V210 automotive open short finder circuit tester powered by 2pcs 9V batteries performs easily locating the circuit breaker point, open connections, broken wires, current leaks with tone change, even trace wire/cable without damaging the insulation. This is a convenient and efficient circuit instrument for DIYers, electricians, and technicians, to simply and quickly judge the continuity of the cables/wire and diagnose the breaker point. ?LOCATING BREAKER POINT EFFICIENTLY?V210 circuit breaker finder tool comes with transmitter and receiver LEDs showing open or short circuit conditions. The Built-in buzzer sound of the signal receiver helps you immediately and easily locate open connections, broken wires, current leaks, and even trace wires.Note: Signal strength affects volume. If the sound is low, try adjusting the probe position to find a stronger signal for accurate detection. ?CHECKING SHORT CIRCUIT?V210 Automotive Short Circuit Finder allows you to find intermittent circuit problems by flexing wires or connectors and listening for a change in the receiver tone without damaging the insulating layer. Receiver with adjustable sensitivity via knob and flexible 7Probe. Note: The sound signal may be affected by propagation,resistance, shielding, and circuit complexity. To improve accuracy, check wiring step-by-step and complete signals to pinpoint the exact short. ?1 YEAR WARRANTY, 24/7 TECH SUPPORT, 60 DAYS NO QUESTION ASKED RETURN/REFUND?We offer 1 Year Warranty, Lifetime technical support, 60 Days No-Question-asked NEW REPLACEMENT OR REFUND. Any questions or concerns, please reach us via vdiagtool2 @ outl ook c om. ?IMPORTANT TIPS?This auto circuit tracer comes with 2pcs 9V Batteries for receiver transmitter. When the signal is not strong enough, the volume will be low in the receiver, please find a strong signal and try to turn the signal up to the highest level; checking whether the battery power is sufficient at the same time, since it will effect the tool working properly. When the tool is not used, please leave it in the OFF position or remove the batteries directly to avoid draining the power.