F999B Listen Through Wall Microphone Amplifier System with Contact and Probe Key Hole Mic microphone blocker Key Operational Features

Key Operational Features

Broad Application Ideal for HR discussions

and ambient wind noise

Frames come outfitted with blue-light filtering protective lenses and carry an IP67 waterproof and sweatproof rating

F999B Listen Through Wall Microphone Amplifier System with Contact and Probe Key Hole Mic microphone blocker Key Operational FeaturesThe F999B High Strength Listen Through Wall System is a professional grade acoustic leakage detector and audio monitoring kit. It operates using a highly sensitive quartz piezo crystal to pick up micro vibrations traveling through solid barriers, amplifying those structural sounds up to 20,000 times into clear audible speech sounds. Listen to conversations through walls, floors, ceilings, doors, windows or other solid surfaces, ideal for security,