Compatible with YAESU FT-818ND FT-857 FT-891 PTT / Headphone / Microphone / CAT Adapter

Features:
External speakers, headphones. External moving microphones, electret microphones.
Use the emergency PTT button that comes with the adapter to launch.
Use the PTT socket of the adapter to connect the PTT switch or the foot switch for transmitting operation.
Using the CAT port of the adapter, it has two channels with the CAT that comes with the machine to implement operations such as communication with the computer and communication with the antenna (FT-817, FT-818 does not have this function, only FT-857, FT-897).