Bluetooth Version: Bluetooth 5.4 Transmission Distance: 10 meters Bluetooth Protocol: HFP/HSP/A2DP/AVRCP Waterproof Level: IPX5 Earbuds Battery Capacity: 50mAh Charging Case Capacity: 400mAh Earbuds Charging Time: About 40 minutes Charging Case Charging Time: About 1.5 hours Earbuds Playing Time: 4 - 7 hours Connection Method: single/double free to use.
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