3 5 eavesdropping devices through walls

...eavesdropping devices by flooding a The Non-Linear Junction Detector (NLJD) detects electronic semi-conductor components in walls, floors, ceilings, fixtures, furniture, containers, or other surfaces. The NLJD is made to detect and locate hidden cameras, microphones, and other electronic devices regardless of whether the surveillance device......

... and large company to protect secrets from eavesdropping and monitoring. People use it to detect any electronic device hidden in walls, floors, ceilings, lamps, furniture or containers. It has 120-200mm detection distance to detect electronic device hide...