WATERPROOF: Has designed and provided fully waterproof of highest incursion protection degree ( Immersion up to 1 m for 30 minutes underwater),some competitors may rating only at splash proof or light rain,not waterproof.To be dust proof,mud proof,shockproof,rainproof,snowproof,free inflatable float accessory provided,which can float your music in the swimming pool,shower,beach 
<br />20W POWERFUL SOUND,STEREO PAIRING FUNCTION:Advanced digital sound,noise/wind reduction technology,and unique loudspeaker cavity structure to deliver premium acoustic sound,crystal clear balanced bass 
<br />DURABLE,RUGGED TOUGH DESIGN:Featuring a smooth rubber exterior that protects the speaker from scratches and impact, one of the toughest Bluetooth speakers,even car ran over it without damage,perfect for travel&hiking,camping,Boating,Kayaking,outdoor adventure 
<br />RECHARGABLE BATTERY,HANDS FREE FUNCTION:Built-in high capacity rechargeable lithium polymer,can be replenished via the micro USB charging port. Answer phone calls using the hands free function.Bluetooth V4.0 Works with cell phones,iphone,iPad, iPod, HTC,Samsung,Tablets,play audio from Laptops,PCs,mp3 player, 3.5mm audio mini jack allows simple wired connectivity