3.5mm Headphone Headset Microphone for PC Laptop/computer Black Mic Sensitivity:	105 dB SPL at 1kHz Headphone Impedance:	 32 Ohm Frequency Response:	8 - 20,000 Hz Adjustable headband, wear comfortable Has the function of canceling noise High quality headphone for clear voice Soft cushion earplugs for maximum comfort With volume control in line