and High Quality This instrument is designed to identify and trace wires or cables without damaging the insulation. You can also use it to check short circuit and loacting open circuit and so on. There are a Sender and a Receiver included in the instrument.Tracing of wires is made possible even inside bundles, conduits, behind panels, under carpets, upholstery, etcEasy to use: simply connect the transmitter in series with the circuit or wire under test, (.: in place of a blown fuse, 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 spot6-42 V : for use in the of vehicles with mixed or single 42 Volt Operates on DC voltages from 6 to 42 voltsInternally against power surges and overloads7inch flexible probe allows reaching wires in congested Transmitter and Receiver LEDs show open or short circuit conditionsAdjustable sensitivity for all tracing situationsNo wire piercing required, non-contact technology Specification:Wire TracingChecking for short circuitlocating open circuitWire identificationItem Length:20.4 cmItem Width:4.4 cmItem Type:Electrical Testers & Test Leads Features:short cable finder.Power Supply:Two 9V batteries RequiredItem Type: Electrical Testers & Test LeadsItem Weight: 0.22kgcolor:As shownMaterial:plasticPackage Contents:1 x Automotive Short and Open Finder (9 Volt Battery Not included)1 x English manualOnly the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.