Wireless Headphones - with microphone, pits, open construction, Bluetooth 5.0, supports A2DP, AVRCP and HFP, active noise control (ANC), voice Assistant, track shuffle, taking calls, with volume control, IPX2 certification, frequency range: 20 Hz-20000 Hz, sensitivity: 92 dB/mW, impedance: 50 Ohm, converter: 12mm, battery life of up to 21 hr(s)