Product information :
Appearance size: 61 (mm)
Material: abs electronic components
Scope of application: maintenance works
Size: 61*35mm
Color: detector
Power supply: built-in lithium battery
Features:
1. High sensitivity to detect the sound of walls, windows, doors or armor plates, with headphones, the sound quality is clear.
2. Simple operation, close to the door, window, wall, adjust the volume until you hear a crisp sound, you can easily listen to all sounds in one step.
Package size: 150 X 95 X 43mm

Packing list:
Sound amplifier*1