KOSS 186818 The Plug 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;