This head-worn music cap features a built-in high-quality graphite speaker and supports music playback and calls. Its classic flat-brimmed design offers four color options including gray, black, white and blue. It combines cotton fabric and plastic accessories to deliver a comfortable, breathable and thick wearing experience. It has a battery life of 4 to 8 hours, a stable transmission range of 20 meters and a convenient TYPE-C charging interface with a rechargeable lithium battery. Note that this cap does not support waterproof functions, so you should avoid contact with water during use.