* High sound quality * Compatible with most smart devices. * Safe and convenient use EARPHONES: Sensitivity: 92dB ± 3dB Frequency: 2OHz-2OKHz Impedance: 16Ω Microphone: 1Omm Tip Type : 3.5 mm Jack Cable Length : 1.2m ± O.O3m MICROPHONE: Sensitivity: -38dB ± 3dB