Wireless headphones

Marshall wireless headphones; Minimum reproducible frequency 20 Hz Maximum reproducible frequency 20000 Hz Impedance 16 Ohm Sensitivity 106 dB Sensitivity parameters dB/mW There is a microphone Weight 4.25 g Moisture protection IPX5 for headphones; IPX4 for the charging caseBluetooth 5.2 (range 5 meters)4;5 hours of play with active noise cancellation (6 hours without)20 hours of play when recharging with the case with active noise cancellation!!!Quick charging in 15 minutes provides approximately 1 hour of listening time3 hours to full Charging the headphones3 hours until the case is fully charged