Features: 100% and High Quality No wire piercing required, non-contact technology Easy to use by just 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. Operates on DC voltages from 9 to 42 volts Adjustable sensitivity for all tracing situations Flexible probe allows reaching wires in congested places Reciever probe is built of coiled steel, can be bent inorder to reach wires in congested areas. This Automotive Short and Open Finder, car repair tool is designed to identify and trace wires or cables without damaging the insulation. You can also use it in checking for short circuit and locating open circuit and so on. Included in the set are Sender and a Receiver with a flexible thus, tracing wires made possible even inside bundles, conduits, behind panels, under carpets, upholstery, etc. Transmitter and Receiver LEDs show open or short circuit conditions Internally protected against power surges and overloads Specifications: Sender Size(Length x Thickness x Height): about 5.5 x 6.5 x 2.3cm(2.17 x 2.56 x 0.91) Receiver Size(Length x Thickness x Height): about 21 x 4.5 x 2.5cm(8.27 x 1.77 x 0.98) Colors: As the picture showed Application : Checking Short Circuit Locating Open Circuit Wire Identification Wire Tracing Receiver: On/Off button Probe length: about 18cm(7.09) flexible probe Test button Sender: Red and black test leads cable length about 60cm(23.62) length Power : 9V battery (NOT Included) Tone/Cont (Continuity) LEDs Tone/Off/Cont (Continuity) switch Package include: 1 x Automotive Short and Open Finder Reciever