Our 2-pin headphones feature a wrap-around ear clip design with a microphone, lapel clip and inline PTT switch. In open and noisy places, the external sound is easy to hear, it can help you better radio. And it can help you use the walkie-talkie more easily, free your hands, and do not delay your other work. With our headphones, you can communicate clearly and freely without affecting your productivity.It is suitable for WeCallPro WCP02 and also for some 2-pin connected walkie-talkies.If you have any questions, please feel free to contact us via Amazon email, it is our responsibility to provide customers with quality services and products