PRODUCT MATERIAL:TPE, ABSPACKAGING MATERIAL:pvc+color cardHOW TO USE:Plug and play; Do not use high-power player. How to use: Answer button: click to answer when the call comes in, click to hang up when the call ends, click to pause/play when listening to music.FEATURES: Comfortable to wear, simple and fashionable.PRECAUTIONS:1. Long-time continuous use may cause damage to your ears; 2. Do not use when driving a vehicle. 3. Try it on prior to purchase.STORAGE METHOD:Keep away from fire and humidity. Store in a dry place.