X1 Active noise Cancellation headphones (bluetooth)

Headphones Headphone Driver: 40mm Neodymium Frequency Range: 20Hz – 20 kHz Impedance: 32Ω Max. Input Power: 30mW Sensitivity (SPL): >111dBm ± 3dBm THD+N at - 3dBFS: -77dB Battery Support: 14 Hours Playback with ANC off Battery Charge Time: < 3 Hours bluetooth