Sennheiser offers their key features
Signature Sound: Equipped with Sennheiser's TrueResponse 7mm dynamic drivers for high-end sound with full bass.
Adaptable Acoustic Feature: Offers open and closed ear adapter sets to customize sound experience and environmental awareness.
Secure Fit: Includes multiple sizes of ear adapters and ear fins for a comfortable and secure fit during workouts.
Durability: IP54-rated splash, dust, and sweat resistance.
Battery Life: Up to 9 hours of playback, with an additional 18 hours provided by the charging case, totaling 27 hours.
