Standard 3.5mm audio plug,apply with all music player and digital products * Convenient to use, easy for carrying ,offer you an incredible stereo sound quality * Using high-fidelity loudspeakers,the all exported more clear,the bass more pure&stronger * Embedded type lithium batteries,can use USB or power adapter for charge,More convenient and user-friendly,cost-saving purphase batteries * Expanded Bass Xpansion System (BXS) drives a fuller, richer low-end response