Dual line structure to enhance the product accessibility and concealment. Transparent acoustic tube transmit sound in high quality and effectively protect the eardrum from sound wave impact. Lapel PTT with high quality microphone, easy and convenient to wear and clear sound performance without distortion. Strong PU cable with tensile strength up to 5 KG, compatible for Motorola CP200 GP300 PR400 etc. This 2 way radio earpiece compatible with leading radio headset brands Motorola. NOT work for Kenwood, Hytera, Puxing, Wouxun, Baofeng, Midland Radio.