Features: 1.Using new components and Japan advanced technology, the sound quality has been greatly improved. 2.It has strong penetrability, whether it is water pipe, cement pipe or steel pipe, it can play a very good effect 3.Built?in 3.7V lithium battery, which can be recharged repeatedly, have long service life and easy to use. 4.Strong practicability, suitable for water leakage detection of various construction pipelines. 5.Design switch, dual detectors, including probes and probes needle, the volume can be adjusted according to the situation. Specification: Item Type: Water Pipe Leak Detector Material: ABS + Metal Charging Method: Power Output (DC5V 300mah) Battery Capacity: 210mah (Shipped With Built-In Battery) Battery Type: 3.7V Lithium Battery Charging Time: 2-3 Hours Sound Collection Time: About 8 Hours, Current About 25mah Continuous Playing Time: About 10 Hours, Current About 20mah Memory: Support 32G Memory Card (Not Included) Probe Sensitivity: -70Db The Highest Audio Magnification: 20000 Times Penetration: Water Pipe/Cement Pipe/Steel Pipe Answering Method: Earphone, 16 Ohm Speaker Can Be Connected How to Use: 1. Insert the probe or probe needle into the [audio input jack] 2. Earphones plugged into [audio output jack] 3. Turn on the power and adjust the sound to the right amount. PackageList: 1 xWaterPipeLeakDetector 1 x Earphone 1 x Probe 1 x Probe Needle 1 x USB Cable 1 x Manual Note: Please turn off and charge first, so as not to damage the machine, charge for about 5 hours.