Sennheiser CX 300S Red Wired Earphones

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.
Ear coupling Ear-canal
Transducer principle Dynamic
Acoustic Principle Closed
Frequency response 17–21,000 Hz (-10 dB)
Nominal impedance 18 Ω
Sensitivity 118 dB SPL @ 1 kHz, 1V RMS
THD, total harmonic distortion < 0.5 % (1 kHz, 100 dB SPL)
Jack Plug 3.5 mm angled
Cable length 1.2 m
Weight 12 g
Microphone
Frequency Response 100 – 10,000 Hz (-10 dB)
Pick-up Pattern Omni directional
Sensitivity -44 dbV/Pa