Use the latest pinhole style sound monitor (AKA microphone) in conjunction with your security cameras to pick up high quality recordings of customers, employees, etc. to be able to have a more accurate idea of what is going on in your home or business. Please refer to local laws in regard to the legality of using this without previous notice and consent. These use built-in digital processing circuits along with dynamic noise reduction controls to help deliver clear sounding voice while minimizing noise and echo. The design is great because it’s tiny enough to hide it from sight while still delivering a monitoring range of 10-50m².