Dedicated to smartphones, tablets. High-end drivers guarantee crystalline sound." Smart button" - used to answer, end calls, play and pause music. Frequency response: 20Hz-20kHz.Impedance: 32 ? ±15%Sensitivity: 105±3dBDead length: 1.6± 0.15m - a cable with a special profile that protects against tangles. #13#10 Note: The headphones are dedicated to devices with a 4-pin mini jack port (3.5mm). If the audio source device has a 2-pin port, the microphone function will not be available. In this case, you should use a special converter (the package does not contain it).