With a size of only 38 x 48 x 18mm, PKI 2920 Miniature Directional Microphone can be attached everywhere quickly and inconspicuously using our „adhesive paste“ and records conversations up to a distance of 50m. This is enabled by the built-in line microphone recording the sound waves coming from the front and converting them into electrical signals. These again are wirelessly transmitted to the required and commercially available smartphone or Bluetooth headphone in the 2.4GHz range. The advantage of smartphone reception is the additional recorder function, filter possibility and inconspicuousness. This development has been made by PKI on request of a ministery and in the meantime it has proven very successful, i.e. small, inconspicuous, powerful.

• Digital data transmission: 2.4GHz, 10 – 50m
• Reception: Smartphone or Bluetooth headphone