New microphone body with 8 pin plugs. Has impedance of 200 to 600 ohm dynamic element wired to replace the Yaesu microphone model MH-1B8 please note no channel/ frequency change PTT and audio only. works on Yaesu radios FT-one/77/102/726/736/747/GX/747/GX/II/757GX/890/980/990/ and may work on others Email me your model I would be happy to check for you. MORE MICROPHONES.