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.

Built-in 52mm driver for Hi-fi stereo sound, S15 bluetooth speaker provides crisp, full-bodied music with impressive volume. S15 bluetooth speaker with 5000mAh rechargeable lithium battery provides up to 8 hours playback time. With solid aluminum alloy case provides smooth touch. And the touch control design makes the Bluetooth speaker easy to switch the mode, adjust the volume, change the songs and more.