Overview Boost your sound with Sennheiser's CX 300S earphones which offer amazingly detailed sound reproduction and enhanced bass response thanks to Sennheisers transducer technology. The in-ear design reduces ambient noise to a minimum, and the included set of ear-adapters guarantees an individualized fit with four sizes (XS, S, M, L) to choose from. A Smart remote enables you to pause music and take calls across all devices. Features Built-in microphone and remote for call and music control. Ergonomic In-Ear design for ambient noise isolation and undisturbed listening. Tough and tangle-free cable for long-lasting listening enjoyment. Technical Data Impedance 18 ohm Frequency response (Microphone) 100- 10,000 Hz (-10 dB) Frequency response 17-21,000 Hz (-10 dB) Sound pressure level (SPL) 118 dB THD, total harmonic distortion < 0.5 % (1 kHz, 100 dB SPL) Ear coupling Ear-canal Jack plug 3.5 mm angled Cable length 1.2 m Transducer principle Dynamic Weight 12 g Earpad size XS;S;M;L Pick-up pattern Omnidirectional Microphone sensitivity 44dbV/Pa Acoustics Closed Sensitivity 118 dB SPL @ 1 kHz, 1V RMS Earpad material Silicon rubber What's in the box CX 300S earphones Ear adapter set (XS/S/M/L) Storage pouch