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 adopts new components and advanced technology.This product use builtin battery (can be recharged repeatedly)Power Consumption: 12mABattery: 3.7V lithium batteriesProbe Sensitivity:60 Maximum Audio Magnification: 13000 times 13000XPenetration: water pipe/cement pipe/steel pipeSound Input: 32 ohm earphone.Matters needing attention:Please turn off and charge, so the damage of the machine is avoided. Charging time can reach 90% in about 2 hours, and it takes more than 3 hours to fully charge.Colour:BlackMaterial:PlasticPackage Contents:1x Water Leakage Detector KitOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/ 13cm.