Wireless Headphones - with microphone, True Wireless pits, semi-closed construction, Bluetooth 5.2, voice Assistant, track shuffle, taking calls, IPX2 certification, frequency range: 20 Hz-20000 Hz, sensitivity: 105 dB/mW, impedance: 32 Ohm, converter: 12mm, battery life of up to 26 hr(s) (6 hr(s)+20 hr(s))