Bluetooth version: New Bluetooth 5.0 Headphone battery capacity: 60 mAh Battery capacity: 3500 mAh Music play time: 300 hours Voice call time: 320 - Protocol support: GHz frequency range, range signal distance: 10 meters, free support device: device with charging bluetooth headphone: put in the charging compartment for charging automatically, and automatic shutdown when power is full. Black color
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