Driver size: 8 mm/ 0.3’’ Dynamic Driver  Maximum operation temperature: 45 °C,  Power supply: 5V 1A  Frequency response: 20 Hz - 20 kHz  Impedance: 16 ohm  Sensitivity: 100 dB SPL@1 kHz  Maximum SPL: 95 dB  Microphone sensitivity: -38 dBV/Pa@1 kHz,  Bluetooth version: 5.3  Bluetooth profile version: A2DP V1.4, AVRCP V1.6.2, HFP V1.8  Bluetooth transmitter frequency range: 2.4 GHz – 2.4835 GHz  Bluetooth transmitter power: <12 dBm (EIRP),  Bluetooth transmitter modulation: GFSK, π/4-DQPSK, 8DPSK  Earbud weight: 4.3 g per pc (8.6 g combined) 0.0095 lbs per pc (0.019 lbs combined),  Charging case weight: 41 g/ 0.09 lbs  Earbud dimensions: 32.4*22*23.3 mm  Charging case dimensions: 64.3*25.8*48 mm,  Earbud battery type: Lithium-ion battery (50 mAh/ 3.85 V),  Charging case battery type: Lithium-ion battery ( 550 mAh/ 3.7 V),  Charging time: 2 hrs from empty  Music playtime with BT on and ANC off: Up to 10 hrs,  Music playtime with BT on and ANC on: Up to 8 hrs,  Talk time with ANC off: Up to 6 hrs,  Talk time with ANC on: Up to 5.5 hrs