Ergonomic comfort and secure fit: Enjoy all-day listening with soft silicone tips designed from extensive in-ear ergonomic research for unparalleled earphone wearability Sennheiser signature sound quality: Exceptional audio with TrueResponse technology, customizable via the Smart Control app for a personalized sound experience from deep bass to crystal clear highs Hybrid active noise cancellation: Block out the world and immerse yourself in your music with effective noise cancelling, or switch to transparent mode to stay connected to your surroundings All-day battery and convenient charging: Power through the day with 8 hours of playtime and an additional 20 hours from the charging case, with convenient Qi wireless and USB-C charging options Advanced connectivity and control: Experience seamless pairing with Bluetooth 5.3, customizable touch controls for audio and calls, and dual-mic technology for clear conversations