Wireless Headphones - with microphone, earplugs, closed construction, Bluetooth 4.2, supports AAC and aptX, with volume control, taking calls, track shuffle, voice Assistant, IPx5 certification, frequency range: 20 Hz-22000 Hz, sensitivity: 113 dB/mW, impedance: 16 Ohm, converter: 47mm, battery life of up to 30 hr(s)