In-ear headphones Sennheiser CX 300-II Precision — wired stereo earbuds, black

Sennheiser CX 300-II Precision are wired in-ear headphones designed for everyday listening. These black stereo earbuds connect via a standard 3.5 mm jack and feature compact housings that sit discreetly in the ear. The package includes multiple ear adapters to help achieve a stable fit and passive noise isolation, making them suitable for use with mobile phones, laptops and portable audio players during commuting and daily activities.

Advantages

The CX 300-II Precision deliver balanced stereo sound with clear midrange and defined bass for a variety of music genres. Compact, lightweight housings reduce ear fatigue, while included silicone ear adapters provide a customizable fit and improved passive noise reduction. The wired 3.5 mm connection ensures compatibility with a wide range of devices without the need for pairing or charging.

Suitable for

• Commuting and public transport audio playback
• Listening to music on mobile devices and portable players
• Use with laptops and tablets for media and calls
• Everyday casual listening at home or outdoors

Key specifications

• Driver type: dynamic in-ear drivers
• Connection: wired 3.5 mm stereo jack
• Design: closed in-ear earbuds with passive noise isolation
• Cable: fixed cable with right-angle or straight 3.5 mm plug (model variant dependent)
• Included accessories: multiple sizes of silicone ear adapters for fit adjustment
• Color: black

How to use

Select the silicone ear adapters that provide a comfortable, snug seal in each ear. Insert the earbuds gently into the ear canal and adjust their position for balanced sound and optimal passive noise isolation. Plug the 3.5 mm connector into the audio output of your device. Control playback and calls using your device; the headphones do not require pairing or charging. After use, store the earbuds with the cable coiled loosely to avoid kinks and protect the housings from impact.

Usage recommendations

For best sound and isolation, try different ear adapter sizes to find the best seal. Keep volume at moderate levels to protect hearing. Avoid pulling the cable when disconnecting; grip the connector instead. Clean the ear adapters periodically to maintain hygiene and sound clarity.