Standard 1pin 3.5mm plug audio jacks; Fits two-way radios (audio only), radio speaker mics, remote mics, MP3 players, and other audio accessories with 3.5mm Audio Jack; Compatible for Motorola Icom radios ,etc.(listen only), for Speaker Mic of Motorola Kenwood Baofeng Icom QUANSHENG Retevis and more.
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