The Sennheiser CX 300S (508594) in-ear headphones are a wired model with a built-in microphone and remote control that combines high sound quality with the convenience of everyday use. Dynamic drivers, a wide 17-21,000 Hz frequency response and effective noise isolation make it the perfect choice for music, calls, and mobile entertainment.

The CX 300S is designed for users who want clear, dynamic sound in a compact form. Closed design effectively dampens ambient sounds, allowing you to fully focus on your favorite songs, podcasts or phone calls. The low impedance of 18 Ohms ensures seamless cooperation with both smartphones and other audio devices.

The dynamic drivers with neodymium magnets guarantee deep bass, crisp midrange and clear highs. With a sound pressure level of 118 dB, you can deliver powerful, crisp sound without sacrificing detail. The wired design eliminates the need for charging, so the headphones are always ready to go.

The built-in microphone and in-line remote control allow you to conveniently answer calls and control music playback without reaching for your phone. 1.2 m cord provides freedom of movement during everyday activities, at work or on the go. It comes with silicone earbuds in four sizes (XS, S, M, L), which allows you to fit the earbuds perfectly to your ear and increase the comfort of wearing.

Specification:
Type: in-ear headphones, closed
Driver: dynamic
Frequency response: 17–21,000 Hz
Sound pressure level (SPL): 118 dB
Impedance: 18 Ohm
Connector: Jack 3.5 mm
Microphone: built-in
Remote control: yes, on the cord
Cord length: 1.2 m
Weight: 15 g