Item Type: Water Pipe Leak DetectorMaterial: ABSProbe Sensitivity: -60 DDBMaximum Sound Amplification: 13000 TimesPenetration: Water Pipe, Cement Pipe, Steel PipeSound Input: 32 Ohm HeadphonesBattery Type: Built In 100mAh Lithium Ion BatteryPackage List1 x Water Pipe Leak Detector1 x Earphone1 x Data Cable1 x Instruction ManualPlease allow some error due to manual measurement.1EASY TO CARRY: Water pipe leak detector is compact and portable, suitable for various construction pipeline leak detection. 2ADVANCED TECHNOLOGY: Wall leak detector uses new components and advanced technology to increase penetration several times. 3RECHARGEABLE FOR REPEATED USE: Water leakage tester uses a built in battery that can be recharged repeatedly for long life. 4CONNECTED DEVICES: Water pipe leakage monitor can be connected to monitors, recorders, transmitters, wireless devices, etc. 5EFFECTIVE NOISE FILTERING: Water leakage monitor effectively filters out noise, dramatically improves sound quality, and detects water outlets faster.