POWERFUL SOUND: 20W astonishing sound design, louder stereo and crystal clear balanced bass, zero distortion by two high-sensitivity drivers, anytime enjoy perfect music. DURABLE MATERIAL& RECHARGABLE BATTERY: Built-in high capacity rechargable lithium polymer, Sturdy Iron + ABS plastic make the speakers stronger, drop off up to 1 meter without damage, perfect for travel&hiking,camping,Boating,Kayaking,outdoor adventure. IPX5 WATERPROOF: IPX5 rating at splash proof or light rain,To be dust proof,mud proof,shockproof,rainproof,snowproof,free inflatable float accessory provided, even bathing, beach or raining days works well.

Superior home theater and music performance.Polk Audio's exclusive Dynamic Balance drivers and tweeters for wide response and low distortion.Rubber driver surrounds for a lifetime of reliable high performance.Wide dispersion drivers and tweeters Magnetically shielded enclosures for reduced distortion from nearby video sources and improved audio clarity Sonically matched speakers are designed to work with each other in a synergistic manner, each performing a specific function in an integrated speaker system with balanced response across all speakers