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
