Wireless Headphones - with microphone, True Wireless earplugs, closed construction, Bluetooth 5.2, supports AAC and SBC, active noise control (ANC), voice Assistant, track shuffle, taking calls, IPX4 certification, frequency range: 20 Hz-20000 Hz, sensitivity: 98 dB/mW, impedance: 16 Ohm, converter: 12mm, battery life of up to 29 hr(s) (9 hr(s)+20 hr(s))