Head-mounted 12. Frequency response: 20 Hz-20 kHz. Mobile phone output audio source: communication equipment. Packing list: headphones + color box packaging + instruction manual. The head beam can be stretched and adjusted to fit your position. Virtual 7.1 surround sound, stereo sound quickly identifies positions and catches disunity. 50mm hi-fi speaker unit. 360 degree hose long microphone, clear sound, just lift when not in use, can be out of sight, stretchable head beam, adjust to suit your position is important The unidirectional hose microphone provides clear audio rendering to avoid miscommunication in games, and when not in use, simply lift it up to get out of sight and without distractions.