Stereo Headset with Built-in Microphone and Click / Hold Button for Apple iPhone - Ear Cusions Included (White) Excellent replacement / Backup for your original iPod / iPhond headset You can answer and end phone calls and control basic music playback simply by pressing the button on the Mic. Excellent sound quality and super clear sound Senstivitity: 116dB - 3dB . Frequency range: 20Hz- 20000Hz . Plug: 3.5mm .Cord Length: 1.2m .