Dongguan Koppo Electronics Co. Ltd

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	Sports Bluetooth Headset Model Number: BT-300B Key Specifications/Special Features: Sports Bluetooth headset specification:CSR 8635: V4.1Speaker diameter: Φ40mmSPL: 106dB at 1kHzFrequency response: 20Hz-20000HzSuccessive working time: about 16 hoursBattery: 3.7V/450mAh ...	2017-10-19