F999B Listen Through Wall Microphone Amplifier System with Contact and Probe Key Hole Mic microphone blocker Advanced Recording and Smart Activation

Advanced Recording and Smart Activation

providing you with a reliable set of eyes and ears where you need them most

it provides a rugged

and ambient wind noise

Despite its small 3

F999B Listen Through Wall Microphone Amplifier System with Contact and Probe Key Hole Mic microphone blocker Advanced Recording and Smart ActivationThe 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,