Small and convenient to carry. Suitable for all kinds of construction pipe leakage detection. The penetrability is increased several times, and the sound quality is greatly improved with the adoption of new components and advanced technology. This product uses a built-in rechargeable battery. Power Consumption: 12mA Battery: 3.7V lithium battery Probe Sensitivity: -60 Maximum Audio Magnification: 13000 times (13000X) Penetration: water pipe, cement pipe, steel pipe Sound Input: 32 ohm earphone Matters needing attention: Please turn off the device before charging to avoid damage. Charging time reaches 90% in about 2 hours, and more than 3 hours for a full charge. Color: Black Material: Plastic Package Contents: 1 x Water Leakage Detector Kit Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the actual item. Measurement error allowance is +/- 1-3 cm.