Driver : 13.4 mm dynamic driver Driver sensitivity : 120 dB @ 1 kHz @ 1 mW Frequency response range : 16 Hz~20 kHz Microphone sensitivity : -42 dBV/Pa Bluetooth version : 5.0 Wireless range : 10 m Battery type : Rechargeable lithium-ion battery Battery capacity : 31 mAh (headphones), 410 mAh (charging case) Music play time (50% volume) : 5 h (single charge), 25 h (with charging case) Charging time : 70 min (headphones), 110 min (charging case) Charging port : Type-C Water resistance (headphones) : IPX4