Sennheiser's CX 100 earphones offer a powerful sound experience with deep and punchy bass. The ultra-small design guarantees excellent comfort while the included set of ear adapters in four different sizes (XS, S, M, L), ensures effective noise blocking that will really let you feel the beat! Overview Sennheiser's CX 100 earphones offer a powerful sound experience with a deep and punchy bass. The ultra-small design guarantees excellent comfort while the included set of ear adapters in four different sizes (XS, S, M, L), ensures effective noise blocking that will really let you feel the beat! Features Renowned Sennheiser sound quality for a unique listening experience. Convenient compact design for easy on-the-go storage. Ergonomic in-ear design for ambient noise isolation and undisturbed.Technical Data Impedance 28 ohm Frequency response 17-20,000 Hz (-10 dB) Sound pressure level (SPL) 119 dB SPL @ 1 kHz, 1V RMS THD, total harmonic distortion < 0.5 % (1 kHz, 100 dB SPL) Ear coupling Ear-canal Jack plug 3.5mm angled Cable length 1.2 m Transducer principle Dynamic Weight 10 g Earpad size XS;S;M;L Acoustics Closed Earpad material Silicon rubber What's in the box CX 100 earphones Ear adapter set (XS/S/M/L)