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      Bluetooth solution: JL6976D4(single mic ENC )

      Bluetooth version: V5.3

      Support system: Android/Apple/PC

      Earphone battery capacity: 30mAh

      Charging box battery capacity: 320mAh

      Impedance: 16Ω ±15%

      Playing time: 4H * 4 times, total 25H (50% volume)

      Speaker diameter: Φ13 mm dynamic driver

      Sensitivity: 104±3dB Earphone charging time: about 1.5 H

      Charging time of charging box: about 2.0 H

      Waterproof grade: structural waterproof

      Earphone size: 54.6*43.1*26.8mm