S310B Remote Wireless Kilovoltmeter is designed for measuring voltage or conduct voltage tests (inductance tester) for both low-voltage or high voltage cables in environments where it is hard to reach. The instrument makes measurements by detecting the electric field. For cables below 65kV, using the contact method of the instrument, regardless if it is a neutral wire, live wire, ground wire, high-voltage transmission line, a metal conductor, or just some current leakage caused by some insulation damage, as long as there is an electric field, this instrument can detect the signal. Once the transmitter detects the electromagnetic field, it will emit a “beep-beep-beep-” buzzer sound. For cables above 65kV, although it cannot be used to measure the voltage, it can be used as an inductance tester to detect live wires and voltage.