Water Pipe Leak Detector Underground Enhanced High Strength Location Monitor for Construction Site Item Type: Water Pipe Leak Detector Material: ABS + MetalCharging 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 ConnectedHow e: 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.