Technical Specifications Driver size: 6.8mm/0.27" Dynamic Driver Power supply: 5V 1A Earpiece: 7.5g per pc (15g combined) / 0.017 lbs per pc (0.033 lbs combined) Charging case: 56.8g/0.13 lbs Headset battery type: Coin Cell battery (55mAh/3.7V) Charging case battery type: Li-ion Battery (510mAh/3.7V) Charging time (USB-C): 2 hrs from empty Wireless charging time: 4 hrs from empty Music playtime with BT on and ANC off: 8 hrs Music playtime with BT on and ANC on: 6 hrs Frequency Response: 20Hz – 20kHz Impedance: 16 ohm Sensitivity: 100dB SPL@1kHz Maximum SPL: 96dB Microphone sensitivity: -30dBV/Pa@1kHz Bluetooth version: 5.0 Bluetooth profile version: A2DP V1.3, AVRCP V1.6, HFP V1.7 Bluetooth transmitter frequency range: 2.4GHz – 2.4835GHz Bluetooth transmitter power: <12dBm Bluetooth transmitter modulation: GFSK, π/4 DQPSK, 8DPSK Maximum operation temperature: 45°C