Feature:1. It has strong practicability and is suitable for water leakage detection of various construction pipelines.2. Detect pipe leakage by amplifying the sound, with headphones, you can adjust the sound level.3. Dual probe design, including circular probe and needle probe, can be switched according to the site conditions.4. Builtin 3.7V lithium battery, which can be recharged repeatedly, which is convenient to use.5. Made of highquality ABS and metal, wearresistant and sturdy, not easy to damage.Specification:Item Type: Leak DetectorMaterial: ABS + MetalWeight: Approx. 380g/13.4ozProduct Size: Approx. 6 x 4 x 2cm/2.4 x 1.6 x 0.8inColor: BlackConsuming Current: 15mAhUse Battery: Lithium Battery 3.7V Batteries (Built-in Battery)Probe Sensitivity: -10D db- -70D dbMaximum Audio Amplification Factor: 20000XPenetrability: Pipe/ Cement Pipe/ Steel PipeAnswering Method: Earphone can be connected with 16 ohm speakerEffective depth of leakage detection: within 1 meterInstructions for use:2. Insert the earphone into the audio output jack3. The red light is on when charging, and the red light is off when completely charged.Package List:1 x Host Detector 1 x Plug 1 x Circular Probe1 x Needle Probe1 x USB Cable 1 x Headphone 1 x Instruction