Special designed with zipper, avoid tangle problem. Unique and fashion, suitable for all-ages. High quality stereo audio sound, enjoy music anywhere. Synthetic cord covered cable, durable, use for long time. On/Off button stop/start music or stop phone talking, free to unlock phone. Microphone convenient to talk phone. 3.5mm audio jack, suitable for various brand and model phone, mp3, mp4. Such as iPhone, Samsung, LG, HTC, Sony Ericsson, Blackberry, Nokia, etc.