Internally equipped with a one to two Type-C charging cable, storage box, and instructions. If you have any issues with the goods upon receipt, please contact our store directly and we will resolve them as soon as possible. It is the lightest and thinnest audio solution on the helmet, with sound quality as clear as your exclusive crystal: JYM 0021 is equipped with a professionally tuned 40mm driver to create incredible sound effects in the helmet. It is the lightest and thinnest helmet sound solution, with sound quality like your personal concert. Higher volume and longer battery life: The volume of snowboard headphones is surprisingly high, which can help you reduce wind noise. In addition, it can play for 12-14 hours when fully charged, providing you with music 24/7. Easy to use:Tpye-C conventional charging is more stable and robust. Each earpiece has a big button that can be easily operated even when wearing gloves. A simple button combination allows you to control each function without removing the device from the helmet. With the buttons, you can easily change, play, or pause music, or answer calls and use Siri (voice control). True wireless and Bluetooth 5.3: Stay away from automatic knotting earphones. M Jiuyunmu wireless Bluetooth headset adopts the latest Bluetooth 5.3 technology, which can maintain stable connection and faster transmission speed within a range of ten meters. Therefore, during mountain biking, hiking, skiing, and snowboarding, you can enjoy conversations and music to the fullest without experiencing audio loss or interruption.