Valco VMK20 wireless ANC headphone - over-ear, closed-back, Bluetooth: 5.0 APTX LL, SBC and AAC, Chipset: Qualcomm QCC3034 with custom DSP setup, up to 45 h running time, ANC: Analog Devices Inc. (ADI) Active Noise Cancellation with 4 microphones, 40 mm drivers, 32 Ohm impedance, frequency range 20 - 20000 Hz, incl. case, USB charging cable and airplane adapter, weight 250 g