Superlux HD351 , Dynamic In-Ear Earphones, Dynamic 13.5 mm neodymium drivers, Sensitivity: 106 dB SPL (1 mW) @ 1 kHz, Frequency response: 20-20,000 Hz, Cable length: 1.2 m, Connector: 3.5 mm Mini jack, Ear pieces in three different sizes are included, Colour: Black