Main Features:

1.Widely applied in Checking Short Circuit, Locating Open Circuit, Wire Tracing, Wire Identification etc. 
Quickly and easily target broken wires, current leaks and so on

2. Diagnose and judge the break point from Slight Change of the continuous audio signal from receiver. 
Transmitter and receiver LEDs show open or short circuit conditions
3.Tracing of wires is made possible even inside bundles, conduits, behind panels, under carpets, upholstery, etc.
4.Easy to use: simply connect the transmitter in series withthe circuit or wire under test, (i.e.: in place of a blown fuse,
across a connector, in series with an open wire, a light bulbsocket, etc.), and scanning the circuit/wire with the tracersflexible probe to find the trouble spot.
5.7" flexible Probe allows reaching wires in congested places; Adjustable sensitivity for all tracing needed. 
Internally protected against power surges and overloads
6. 42V Ready: for use in the new generation of vehicles withmixed or single 42 Volt systems
7.Internally protected against power surges and overloads, operates on DC voltages from 6 to 42 Volts under any circumstances

8.Delicate bag included, easy for carry. Powered by 2 pieces 9V 6F22 Batteries (Not included)

How to use the probe? 

The probe of the Receiver is built of coiled steel and may be bent as needed, in order to reach

wires in ongested or difficult areas. Depending on the  circuit  characteristic and sensitivity settings,

the probe will pick up the signal from  the wire in a range of positions. However, for the best

possible  range the  Receiver's probe tip (black cap) should be positioned perpendicular  (at 90°) to the wire being traced and either above or below it.