When you open the case and put in the earbuds, the sound hits you. The earbuds and portable charging case are designed to be able to carry no matter where you go and fit easily into your pocket. The comfortable earbuds have up to 6 hours of listening time and the charging case allows up to 20 hours of playback. Enough to keep you going all day! When receiving a call simply answer it in stereo sound thanks to the ENC integrated microphone for perfect calling quality. The IPX 4 rating makes the earbuds weather proof so no worries to take them outside. Earbuds and charging case made with RCS (Recycled Claim Standard) certified recycled ABS. Total recycled content: 55 % based on total item weight. RCS certification ensures a completely certified supply chain of the recycled materials. Urban Vitamin items are made without PVC and packed in plastic reduced packaging.