Wireless Headphones - with microphone, True Wireless behind-the-ear, closed construction, Bluetooth 5.0, supports AAC and SBC, voice Assistant, track shuffle, taking calls, with volume control, IPx7 certification - waterproof and sweatproof, frequency range: 20 Hz-20000 Hz, sensitivity: 100 dB/mW, impedance: 16 Ohm, converter: 6mm, battery life of up to 36 hr(s) (6 hr(s)+30 hr(s))