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Key Features Headband Style Bluetooth Noise Cancelling Microphone Waterproof Bluetooth V4.1 compatible IOS and Androdsystem ,matching the AUX audio port,can comprehensively connect the all audioterminal devices.let you enjoy the music in any place and time. Doubleequipment connection.it can connect 2 bluetooth devices at the same time.you donot need to switch and matching repeatedly. Adapting the intelligent power module,lead to playing 14 hours continuously