Mobile Spec Chords Noise Isolating Earbuds w/Mic 8mm High Definition Drivers Compatible with Most Mobile Phones and Audio Devices Noise Isolation Ear Pads are Included in 3 Sizes for a Custom Fit Impedance: 16 Ohms Sensitivity: 112dB +/-3dB Frequency Response: 20Hz to 20kHz 4' Cord Length with 3.5mm Plug 100mW Rated Power