Main Features:Good sealing performance、 leakproofSuper bass、 suitable for all kinds of music style like pop、 rock、 country、 etc.IPX4 water resistant performanceSupport hands free call、 broadcast incoming call numberFashionable and casual、 lightweight and easy to portableProduct Parameters:Bottle Material: Tritan copolyester ( Food level )Bottle Capacity: 400mLSpeaker Type: Outdoor portable Bluetooth speaker、 bicycle speakerBluetooth System: Dual drivers and dual passive bass radiators audio systemBluetooth Version: V3.0Connection Method: Wireless Bluetooth connectionRecharge Method: DC5V Battery Capacity: 500mAhRated Power: 3WFrequency Range: 280Hz - 17.5KHzCharging time: 1.5 - 2 hoursWorking time: 4 - 5 hoursChannels: 3 (2.1) Model Number: JT2641 Special Feature: Portable、Wireless Type: ActivePackage weight: 0.324 kg Product Size(L x W x H): 6.90 x 6.90 x 23.50 cm / 2.72 x 2.72 x 9.25 inches Package Size(L x W x H): 9.00 x 9.00 x 25.00 cm / 3.54 x 3.54 x 9.84 inchesPackage Contents: 1 x JT2641 Outdoor Sport Bottle Bluetooth Speaker、 1 x Bilingual User Manual in English and Chinese、 1 x USB Charging Cable