Bone Conduction Earphones Wireless Headphones Sport Bluetooth Headset - Black. Bluetooth pairing: Bluetooth GCDBluetooth version: 5.0Charging port: AndroidTransmission distance: 10MBattery: 90mahPrompt tone: EnglishEndurance: about 7-8hPlayback duration: about 3-4hColour: BlackWeight: 52.5g.
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