Features: - Built-in mic: Supports hands-free talking - On-cord control: Supports one-key to answer / hang up calls - 10mm driver unit: Provides more detailed sound 3.5mm plug: Applied to all 3.5mm jack audio devices - 1.2mm nylon cable: Tangle-free - Impedence: 16Ohm - Sensitivity: 90dB - Frequency Response: 20Hz - 20kHz. What's in the box 1X Awei Q5i Stereo In-Ear Headset, 1X Earphone Clip, 2X Spare Earbuds, 1X Booklet