Check the listing for details. EM415PRO Auto Cable Short Circuit Breakpoint Tester Car Broken Wire Detect 6~42V. Color: Black, Condition: New. Listed at 18.98 USD. Descriptions: Tracing of wires is made possible even inside bundles, conduits, behind panels, under carpets, upholstery, etc. Easy to use: simply connect the transmitter in series with the circuit or wire under test, (i.e.: in place of a blown fuse, across a connector,in series with an open wire, a light bulb socket, etc.), and scanning the circuit/wire with the tracers flexible probe to find the trouble spot. 42 V Ready: for use in the new generation of vehicles with mixed or single 42 Volt systems. Operates on DC voltages from 6 to 42 volts. Internally protected against power surges and overloads. 7" flexible probe allows reaching wires in congested places. Transmitter and Receiver LEDs show open or short circuit conditions. Adjustable sensitivity for all tracing situations.