Sennheiser CX 300S headset

Sennheiser CX 300S wired in-ear headset provides detailed sound reproduction with enhanced bass response thanks to Sennheiser transducer technology. The lightweight, ergonomic in-ear design reduces ambient noise and the included set of ear adapters (XS, S, M, L) ensures an individualized fit. An integrated microphone and smart remote allow call handling and music control across compatible devices.

Advantages

Built-in microphone and remote enable call management and playback control without reaching for the source device. The ergonomic in-ear shape offers effective ambient noise isolation for undisturbed listening. A durable, tangle-resistant cable increases reliability and everyday usability.

Suitable for

• Listening to music with pronounced bass and clear treble
• Hands-free calls on smartphones and other compatible devices
• Commuting and travel where noise isolation is useful
• Everyday use with wired audio players and computers

Key specifications

• Impedance: 18 Ω
• Sensitivity: 118 dB (44 dB V/Pa)
• Plug: 3.5 mm
• Cable length: 1.2 m
• Weight: 12 g
• Ear adapter sizes: XS, S, M, L
• Connectivity: Wired, in-ear (intraaural)
• Color: Red

How to use

Select the ear-adapter size that provides a comfortable, snug fit to achieve effective noise isolation and optimal sound. Insert the earphones with the correct left/right orientation, connect the 3.5 mm plug to your device, and use the remote to play/pause audio or answer calls. Keep the cable untangled and secure the cable to clothing if needed to reduce microphonics during movement.

Recommendations

For best performance, choose the ear-tip size that seals the ear canal, avoid excessive volume levels to protect hearing, and store the earphones in the supplied pouch when not in use to extend their lifespan.