Wireless Headphones – with microphone, True Wireless pits, open construction, Bluetooth 5.0, active noise control (ANC), with volume control, taking calls, track shuffle, voice Assistant, IPX2 certification, frequency range: 20 Hz-20000 Hz, sensitivity: 92 dB/mW, impedance: 50 Ohm, converter: 12mm, battery life of up to 29 hr(s) (8 hr(s)+21 hr(s))