Wireless Headphones - with microphone, True Wireless earplugs, closed construction, Bluetooth 5.0, supports AAC and SBC, power bank, track shuffle, taking calls, with volume control, IPx5 certification, frequency range: 20 Hz-20000 Hz, sensitivity: 108 dB/mW, impedance: 32 Ohm, converter: 12mm, battery life of up to 30 hr(s) (5 hr(s)+25 hr(s))