When you open the case and put on the headphones, the sound hits you. The headphones and the portable charging case are designed to be carried wherever you go and easily fit in your pocket. The comfortable headphones have up to 6 hours of listening time and the charging case allows up to 20 hours of playback. When you receive a call, simply respond with stereo sound thanks to the integrated ENC microphone for a quality call. Just touch the headphone to answer. IPX 4 makes the headphones weather-resistant. Headphones and charging case made from RCS (Recycled Claim Standard) certified recycled ABS. Total recycled content: 55% based on the total weight of the item. The RCS certification guarantees a fully certified supply chain of the recycled materials. Urban Vitamin items are manufactured without PVC and in reduced plastic packaging.