This is a Electret condenser microphone / speaker.
Included 2,5mm and 3,5mm PCB jack sockets kit for panel mounting and wiring diagram.
Attention: for ILER-40v3, ILER-20v3 kits can not use the internal speaker.
This is a Dynamic microphone.
Suitable for radios with dynamic microphone input (no electret condenser mic).
Good quality 600ohm dynamic capsule. Include 3,5mm metalic jack plug and wiring diagram.