niceEshop(TM) Multi-function Automobile Circuit Tester Car Auto Power Electric Circuit Tester Multimeter (Red) Automotive Circuit Testers can used to do line detect, electricity detect. And because it have led bulb design, can used for lighting Automotive Circuit Testers can accurately detect various line faults under the situation of no damage to rubber cover It is convenient to use, efficient to detect, easy to operate and has reliable performance Automotive Circuit Testers can detect each fault in the place where the space is narrow and light is weak has the functions that the top-level multimeter fails to do. It specially detects the wires with bad contact and aging wires