The Sennheiser CX True Wireless Sport are wireless earbuds designed to keep up with an active lifestyle. They feature 7mm dynamic TrueResponse transducers that deliver a wide frequency range from 5 Hz to 21,000 Hz, ensuring a balanced sound for various genres of music. With an IP54 rating, these earphones are resistant to dust, splashes, and sweat, making them a reliable companion for intense workouts or outdoor activities in unpredictable weather. To ensure a secure fit during movement, the package includes interchangeable fins and both open and closed ear adapters. The earbuds provide 9 hours of playback on a single charge, while the included USB-C charging case extends the total battery life to 27 hours. You can manage your music, take calls, and access voice assistants through an intuitive touch interface, and further customize your listening experience using the built-in equalizer via the Smart Control app. Constructed from lightweight ABS plastic, the set weighs 41 g, which helps reduce fatigue during long sessions. The integrated microphone allows for clear communication, and the adjustable sidetone feature lets you hear your own voice more naturally during calls. These earphones suit anyone who needs a durable, stable audio solution that balances athletic utility with high-fidelity sound.