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Feature: *Waterproof outdoor bicycle Bottle bluetooth speaker *Super deep bass,Rated power 3 W, 360° surround stereo sound *Handsfree call *Built-in rechargeable battery *Charging by USB *Support TF card playing *Voice prompt function *IPX4 waterproof level *Bottle material:PCTG (Food level material) Specification: RF range: 10M Frequency response: 100HZ-20KHZ Output speaker: 3W S/N ration: 75db Built-in Lithum battery: 650mAh Charging voltage: 5V 500mA USB power sources Charging time: 2-3 hours Playback time: 3-4hours Water storage capacity :400ml Product size: 68*241mm Unit weight:206g/296g Standard colors: Red,green,yellow ,black Package Contents: 1x Speakers 1x USB Cable 1x Manual