Wireless Headphones - with microphone, True Wireless earplugs, closed construction, Bluetooth 5.2, voice Assistant, track shuffle, taking calls, IPx5 certification, frequency range: 20 Hz-20000 Hz, sensitivity: 100 dB/mW, impedance: 16 Ohm, converter: 6mm, battery life of up to 25 hr(s) (6 hr(s)+19 hr(s))