and High ! This instrument is designed to identify and trace 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 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, (.: 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 spot 6-42 V : for use in the of vehicles with mixed or single 42 Volt Operates on DC voltages from 6 to 42 volts Internally against power surges and overloads 7inch flexible probe allows reaching in congested Transmitter and Receiver LEDs show open or short circuit conditions Adjustable sensitivity for all tracing situations No wire piercing required, non-contact technology! Specification: Wire Tracing Checking for short circuit locating open circuit Wire identification Item Length:20.4 cm Item Width:4.4 cm Item Type:Electrical Testers & Test Leads Features:short cable finder. Power Supply:Two 9V batteries Required Item Type: Electrical Testers & Test Leads Item Weight: 0.22kg color:As shown Material:plastic Contents: 1 x Automotive Short and Open Finder (9 Volt Battery Not included) 1 x English manual Only the above content, other are not included. Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.