Features 1、Simple Operation: Move the detector close to a door, window, wall, adjust the volume until you hear a clear sound, and you can easily hear all sounds in one step. 2、High Sensitivity Detection: The high sensitivity detection of sound from wall, window, doors or armor panels, with headphones included for clear sound quality. 3、Fully Functional: Wall pipe listen detector tool has charging hole, headphone jack, switch button. Probe sensitivity is‑60DDB. 4、Applicable Battery: Lithium battery 3.7V, battery model 501518, battery capacity 100mAh (delivered with bBuilt in battery). 5、Strong Penetrability: The water pipe detector has strong penetrability, whether it is water pipe, cement pipe or steel pipe, it can play a very good effect. Specifications Item Type: Wall Pipe Leak Detector Material: ABS Color: As Pictures Shown Weight: Approx. 70g / 2.5oz Current Consumption: 12mA Applicable Battery: Lithium Battery 3.7V (Delivered with Built in Battery) Battery Model: 501518 Battery Capacity: 100mAh Probe Sensitivity: -60DDB Highest Audio Magnification: 13000X Penetration: Water Pipe, Cement Pipe, Steel Pipe Product Size: Approx. 3.5x3.8cm / 1.4x1.5in Answering Method: 32 ohm Headphones Package List 1 x Detector 1 x Headphone 1 x USB Cable 1 x Manual