Waterproof probe, this detector can be used to detect wall studs, metal pipes, PVC pipes and even water pipes. It pinpoints hidden blockages, blockages in pipes, and alerts you with a buzzing sound. Adjustable sensitivity, one-piece design for easy storage, non-slip handle for easy handling and carrying, and long service life. how to use: 1. Introduce the signal wire and transmitter into the pipeline until the signal wire cannot move forward. At this point, the end of the probe is in the blocking position. 2. Turn on the power switch of the signal transmitter, the red indicator light is on 3. Turn on the signal receiver switch, the hand-held signal receiver will detect along the general direction of the buried pipeline. If you get close to the probe receiver in the pipe, the horn will make a sound, the louder it is, the point of clogging. Make a record, first unplug the signal line and dig the ground before processing 4. If the test distance is short or the green indicator light is on, it means the battery is low, please replace the battery, if it is a rechargeable model, please charge it in time, the charger turns green to indicate that it is fully charged, and the receiver and transmitter are charged at the same time