Wireless Headphones - headset, around the ears, closed construction, 3,5mm Jack, Bluetooth 5.0, track shuffle, taking calls, with volume control, frequency range: 20 Hz-20000 Hz, sensitivity: 100 dB/mW, impedance: 32 Ohm, converter: 40mm, removable cord length of 1,2m, battery life of up to 30 hr(s)