The battery test pen can be used to check vehicle health and battery status. Probe with protective cap (tightenable) Metal body, ergonomic design. Flexible wires have good tensile strength. Ideal for cars, boats, motorcycles and small engines Feature: A measuring device used to indicate the voltage from 6V to 24V in the circuit of automobile electrical system. It is useful when installing electrical equipment in the vehicle, such as alarm systems, ignition locks, light switches and audio equipment. Allows you to find gaps in the circuit, test fuses, relays, bulbs, etc. The circuit tester and car fuse tester are very lightweight, and the lightweight design brings you great convenience, and you can take them with you. The handle of the test lamp is made of high quality copper, and the probe is made of hardened and chrome-plated carbon steel. The pointed steel probe can easily penetrate the insulation layer of the wire to check the circuit, which is convenient to use. The test light flashes. After the circuit is plugged in, the indicator light on the handle lights up to identify the fault of the vehicle's low voltage circuit. This professional car high power circuit test pen is used to test 6-24V DC voltage and is used to quickly check car headlights, taillights, flashlight circuits, faulty sockets, connections, fuses, broken wires, etc. Item List: 2 * voltage tester + light fixture