Headphone type: in-ear

Speaker size: 6 mm Number of channels: Stereo Frequency response: 20 Hz – 20 kHz Headphone sensitivity: 99dB at -10dBFS Microphone sensitivity: -42 dB at 1 kHz/Pa Headphone impedance: 16 ohms Bluetooth version: v5.2 Operating distance: 10 m Sound control: Yes Backlight: Yes Headphone battery type: lithium battery (60 mAh) Charging Case Battery Type: Lithium Battery (400mAh) Charging power: 5V=1A Headphone charging time: <1.5H (low battery to fully charged) Case charging time: <2H (discharged battery to fully charged) Music playing time with one charge: 6h Playtime from charging case: 24h Weight: Headphone: 9g / Charging case: 47g