Features1High sensitivity, strong penetration, the penetratingpower is increased several times, and the sound quality is greatly improved.2It can be connected to the display spectrum, recording pen, transmitter, wireless equipment, etc. , and can also be inserted into the two-channel wire to record directly.3Small and light weight for easy carrying.4Easy operate, cling to the door/window/wall, adjust the sound with the knob until you hear a clear sound.5Able to get the sound out from the wooden/brick wall/windows/door. 6Effectively filter noise and detect sound faster.SpecificationIt can captures subtle sounds through the wall, which is perfect for detecting broken hose inside the wall and finding leaking locate.Features:High sensitivity, strong penetration, the penetratingpower is increased several times, and the sound quality is greatly improved.It can be connected to the display spectrum, recording pen, transmitter, wireless equipment, etc. , and can also be inserted into the two-channel wire to record directly.Small and light weight for easy carrying.Easy operate, cling to the door/window/wall, adjust the sound with the knob until you hear a clear sound.Able to get the sound out from the wooden/brick wall/windows/door.Effectively filter noise and detect sound faster.Specifications:Color: blackCunsumption current:12mAhProbe sensitivity: -60dBWorking time: 5-7hBattery: 3.7V, 100mAhItem size: 37 * 34 * 27mm / 1.5 * 1.3 * 1.1inItem weight: 25g / 0.9ouncePackage size: 93 * 80 * 37mm / 3.7 * 3.1 * 1.5inPackage weight: 73g / 2.6ouncePacking List:1 * Voice Listen Detector1 * Earphone1 * USB Cable1 * User ManualPackage List1 * Voice Listen Detector1 * Earphone1 * USB Cable1 * User Manual