SB-914 HMC-1 Not to be used with the TH-205/215AT 11-24-86 Althought the connectors on the HMC-1 VOX headset match the speaker and microphone jacks on the new TH-205/215 series, VOX headset operation cannot be used with these radios. The SMC-30 speaker microphone can be used with the newer sets. (c) 121589TKC