New microphone contact / wall-of-use professional SEM999. Incorporates a contact probe of high sensitivity of 39 mm diameter needle-free, totally flat. Audio output for recording, 4 different filters and limiter sound.
Microphone spy FL 1000 Sun Mechatronics. New microphone contact with a recording system built-in, audio limiter, and 4 different filters. You'll be able to hear everything that is said behind a door, wall or glass.