Features: The water leakage detectors detects pipelines leaks by amplifying the sound, and the volumes can be adjusted by wearing headphones. Highly practical and suitable for detecting leaks in various building pipelines. Penetration: pipe/cement pipe. High sensitivity :double probes design, including circular probes and needle probes, can be switched according to the on-site situation. probes sensitivity: -10Ddb -70Ddb. maximums sound amplification factor: 20000X. The pipelines leakage detectors is crafted from ABS and metal, which is wear-resistant, and not easily damaged. Builtin 3.7V battery, rechargeable and easy to use. Instructions :1. Insert the probes or probes into the sound input jacks; 2. Insert the headphones into the sound output jacks; three The red light is on when charging, and it goes out when fully charging. Equipped with a storage bag, it is very convenient to store products. Specifications: Component:ABS probes sensitivity: -10- -70 maximums sound magnification: 20000X. Package Includes: 1Set Leakage Detection Monitor note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.