Product model (headphone): ETE21Product model (charging box): ETE22Sound unit: 12.4mm dynamicFrequency response range: 20Hz-20kHzBluetooth codec: AAC/SBCNoise Control Mode: Noise Reduction Mode / Transparency ModeCall noise reduction: dual microphone + AI call noise reductionMicrophone sensitivity: -38dBV/PaBluetooth version: BT 5.2Bluetooth effective distance: 10mBattery Type: Rechargeable Lithium-Ion BatteryBattery capacity: 43mAh (earphone) / 440mAh (charging box)Charging time: 90min (headphone)/120min (headphone + charging box)Charging Port: USB Type-C
