High-Sensitivity Acoustic Microphone: Capable of penetrating solid walls up to 12 inches (Note: does not work on hollow walls), allowing clear audio capture from the other side.
Fine-Tuning Filter: Equipped with a fine-tuning filter to enhance and refine audio quality for clearer listening.
Audio Output Socket: Includes a 3.5 mm mono output for connecting a digital voice recorder (not supplied) to capture audio evidence.
Easy Operation: Simple to use by gently pressing the ceramic contact microphone against any solid wall to retrieve vibrations and convert them into audible sound through the supplied earphones.
Durable Construction: Made of high-quality brushed aluminum, ensuring durability and longevity.
Extended Battery Life: Powered by a PP3 battery, providing up to 24 hours of continuous use.