Brand: Yison Working frequency: 20-20KHz Impedance: 32Ω±15% Sensitivity: 90dB±3dB Frequency response: 20Hz-10KHz Drive unit: 12mm Dynamic speaker Yison headphones with microphone. Yison headphones take the music experience to the next level, offering extremely clear and rich sound, which highlights the smallest detail of the listening, while, with the built-in high-performance microphone they have, you allow you to make phone calls. Socket-excellent sound quality-stable and comfortable to use-built-in microphone-in-volume volume keys, music and call-cable TPE, high strength, unmixedTechnical features.