Features: - Bluetooth: version 5.1 - Driver size: 40 mm - Sensitivity: 96 ± 3 decibels - Frequency response: 20 Hertz ~ 20 kiloHertz - Distance: up to 10 meters - Noise cancellation frequency range: 40 Hertz ~ 600 Hertz - Noise cancellation center frequency: 100 Hertz ~ 300 Hertz - Charging port: Type-C - Charging time: 1.5 to 2 hours - Working time: up to 45 hours - Charging cable length: 30 cm