The unmistakable sound of Sennheiser: The TrueResponse transducer system ensures exceptional sound fidelity as desired by artists, capturing every detail and emotion. It delivers a high-end audio experience with powerful bass, refined by enhanced treble reproduction. Complete control over your sound: Choose from various options to customize your audio: guided tests for personalized sound profiles, adaptive 5-band EQ, Sound Zones, Sound Check, or preset modes. Future-proof technologies: With Auracast support and LE Audio, you are equipped for the future and can take advantage of codecs thanks to Bluetooth 5.4 compatibility. Lossless sound: Guarantees a bit-for-bit transmission of audio data, ensuring uncompromising sound quality during wireless listening. Adaptive Active Noise Cancellation (ANC): Automatically adjusts noise cancellation to the environment, providing an immersive listening experience. Transparency mode: Allows ambient sounds to be perceived without having to remove the headphones, and ensures natural communication with the environment thanks to low-noise microphones. Long battery life: Up to 7.5 hours of playtime, extendable to 30 hours with the charging case, plus fast charging for one hour of playtime in just 10 minutes.