Portable Bluetooth Speaker GK01 (New Version - Bluetooth 4.0) - Best Wireless Experience For Outdoors - Waterproof And Shockproof - Use In The Shower Or As A Cell Phone Speakerphone - 100% Satisfaction Guaranteed - (Yellow) Powerful JYBO Speaker Utilizing the latest Bluetooth 4.0 technology for Stunning Full Range Streaming Sound and Control. Simple operation for pair/play/pause, next/back and volume up/down. Crystal clear highs with amazing mids and bass. Extremely Rugged: Waterproof, Dustproof, Shockproof. Sealed Rubberized Shell. Can be used in any environment (indoors, outdoors, home, office, hot tub, pool, shower, etc.) Works with any Bluetooth enabled device (hold play/pause button for 3 seconds to pair). iPhones, iPads, iPods, Android phones, Blackberrys, Tablets, PCs, etc. Included: Latest minimalistic design USB charging cable for convenience and carabiner for the ultimate portability. Speakerphone capability. Built-In Rechargeable Lithium Polymer Battery provides over 10 hours of playtime at 50% volume