It is designed to identify and trace wires or cables without damaging the insulation. You can also use it in checking for short circuit and open circuit and so on.
There are a Sender and a Receiver 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 Receivers probe tip (black cap) should be positioned perpendicular (at 90o) to the wire being traced and either above or below it.
Checking for short circuit
Locating open circuit