Underground Wire Locator Cable Tester Tracker With Headphones For Locating Wires And Cables Application of Ground Wire LocatorThe wire finder adopts advanced frequency generating device, which can generate alarm sound at the sound end. The closer the distance, the louder the sound . In a noisy environment, you can use an external headset to listen to voice recognition, and you can also search for other metal cables through the adapter. The transmitter has a DC level test function, and the level can be judged by the brightness of the status indicator: the brighter the light, the higher the level; the darker the light, the lower the level. Wire Tracer RangeUp to 2 feet deep and 3280 feet long. Power supply: 9V alkaline battery. The 9V battery is not included in the package. Network cable side line function/sequence length is up to 1KM [How to use] Red clip on a cable to be tested, and black clip on the ground. In this way, the signal will be stronger and the effect will be better. Sound Level AdjustmentHigh-sensitivity sound level adjustment and earphone receiving method is more convenient and comfortable. Please noteDo not use on live circuits to avoid damage to the tester This device is mainly used for locating unpowered cables or low voltage below 24V. F02 wire locator is only suitable for single and two-core wires, not for multi-core wires and bundled wires."