F999B Super Sensitive Listen Through Wall Contact Microphone and Probe Key Hole Mic Amplifier System

The ultimate professional listen through wall system that can hear sound, speech and conversations through thick concrete, metal, wood, brick, window, door, floor, ceiling, pipes and any type of solid surface.

We have received varied results depending entirely on the surface used and other factors like distance and volume of sound. 

A decent pair of ear buds are included providing good sound however it can be improved further with premium quality noise cancelling headphones.

The F999B professional listen through wall amplifier has a high sensitivity Piezo contact and 6" probe microphone. Both microphones are built into solid metal housing for sound quality and durability. Enhanced quality sound performance capable of listening to conversations in adjoining rooms and houses. Built in rechargeable lithium battery and all accessories you will need to achieve the job. The high sensitivity contact microphone with superior detection ability uses best quartz crystal piezo insert. Which makes it perfect for professional pipe fitters, plumbing and construction as well as Surveillance work

Disclaimer warning: illegal use of this product is not allowed! Do not use this product to engage in illegal activities or promote dangerous and illegal acts. Please check local laws in your country for type of use permitted.

Features and Specifications
Penetrable surfaces: Cement, Metal, Wood, Iron, Glass, Plastic, Brick
Working time: Continuous monitoring up to 24 hours
Headphone output: 3.5mm stereo @ 250mW
Four audio channel: 1200Hz, 800Hz, 200Hz
Maximum gain amplification: 20000 times
Battery type: 3.7v lithium battery
Microphone sensitivity: -70db
Current consumption: 10mA
Record line output: 3.5mm Jack socket
Battery capacity: 250mA

Items Included

• Wall contact microphone
• Earbuds
• Probe microphone
• Headphone Amplifier
• USB Charger lead
• ABS Storage Case