KOSS 186818 Plug Classic Noise-Isolating Earbuds

• Dynamic element positioned just outside the ear ;• Soft foam cushion eartip made of hydrophilic-formed urethane expands for a custom fit;• Freq resp: 10Hz-20kHz;• Imp: 16ohm ;• Sensitivity: 112dB/mW;• 4ft, straight, dual-entry cord;• Includes 4 extra eartips;• Limited lifetime warranty;• Black;