Wireless Headphones - with microphone, True Wireless earplugs, closed construction, Bluetooth 5.1, supports SBC, voice Assistant, track shuffle, taking calls, with volume control, IPx5 certification, frequency range: 20 Hz-20000 Hz, sensitivity: 20 dB/mW, converter: 14mm, battery life of up to 30 hr(s) (5 hr(s)+25 hr(s))