The Swirl Earphone is designed by Kilo Design with emphasized on industrial design, providing good quality in the material. On top of their unique looks, the AIAIAI Swirl earphones are designed to minimize external noise, by delivering changeable silicon and foam buds for all size ear canals. Quality drivers precision tuned by C4 Studios provide a full 20,000Hz frequency response range for excellent sound reproduction. In addition, they feature a super thick Y-shaped piece of plastic and thick cords which makes wearing the AIAIAI earphones a tangle free experience. Driver unit size: 10mm Impedance: 16 ohm Sensitivity: 106dB/mW at 1K Hz Frequency Respons: 20-20K Hz Rated power input: 4 mW Maximum power input: 20 mW