new homehold cross-border outdoor bag large capacity audio waterproof multifunctional large volume subwoofer sound box backpack

New home-use cross-border outdoor backpack with large capacity sound system, waterproof multi-functional design, powerful bass experience with large volume, and dual shoulder straps for portable and hands-free use. Key features: long battery life, quick Bluetooth connection, IPX7 water resistance. Solves user pain points: music needs for outdoor activities, waterproof and sweat-proof, portable and not cumbersome. Quality assurance. Let music accompany every adventure, stimulate life enthusiasm, and share beautiful times.