Bluetooth version: 5.3 Driver size: 8mm Effective range: 10m Frequency response: 20Hz-20KHz Sensitivity: 102 ± 3dB Impedance: 32 ± 15% Microphone sensitivity: -42dB Listening Time: Up to 6H @50% Volume Standby Time: Up to 120 hours Charging time: Approx 2 hours Earbuds Battery: 40mAh each Charging Case Battery: 350mAh Charging Plug: Type-C