It can capture subtle sounds through the wall, which is perfect for detecting broken pipes inside the wall and finding leaking locate.

Features:
Easy to listen all the action.
High sense metal probe and detector.
Coming with earphone.
Small and light weight for easy carrying.
Easy operate, cling to the door/window/wall, adjust the v-olume until you hear a clear sound.
Able to get the sound out from the wooden/brick wall/windows/door/armor plate.
Can be used as recording pen.

Specifications:
Color: black
Cunsumption current:10mA
Measuring e-lement sensitivity: -70db
Highest audio enlargement multiple: 20000X
Battery: 5V, 200mAh
Item size: 57 * 35mm / 2.2 * 1.4in
Item weight: 25g / 0.9ounce
Package size: 112 * 87 * 45mm / 4.4 * 3.4 * 1.8in
Package weight: 45g

Packing List:
1 * Voice Listen Detector
1 * Earphone
1 * USB Cable