Product Features: High quality headset made with military grade parts Durable and thick cable, designed for tough environment 2 Push-to-talk Buttons (1 big Shoulder PTT and 1 small finger PTT ) for easy and convenient using Flexible & fully adjustable band for comfortable wearing Clear sound expression speaker Sensitive vibration detecting microphone Transparent flexible acoustic sound tube & soft plastic earbud 1 spare plastic earbud included Compatible Topcom Radio 1-pin Models: Twintalker 1100, 1302 Twintalker 3800 Twintalker 7000, 7100 Twintalker 9200, 9210, 9500 More other models, please feel free to contact us for details.