Sennheiser MOMENTUM True Wireless 4 Earbuds feature Adaptive Noise Cancellation, Qi wireless charging, and a 30-hour battery life. Listen to high resolution wireless audio thanks to Bluetooth 5.4 and Sennheiser's TrueResponse transducer system, which delivers a high-end sound experience with clear, deep bass and a refined treble response. Experience the wireless audio of tomorrow with future-proof technology such as Auracast and LE Audi. Tailor the sound experience to your taste with a choice of presets and an intuitive equalizer feature. Next-generation Adaptive Noise Cancellation automatically adjusts the level of noise cancelling when the noise level in your environment changes. You can also stay in touch with your surroundings and bring back the world at a touch with Transparency Mode. Talk with a crystal-clear voice thanks to three noise cancelling microphones on each earbud that make sure people only hear you and not your surroundings. High quality voice pick-up is also ideal for phone calls and voice assistant access. Stay connected, productive, and entertained throughout your day with an outstanding 30 hours of listening pleasure thanks to a new high quality battery system. There's even a quick charging feature that provides an hour of playtime in just 8 minutes. Recharging the case is simple thanks to Qi wireless charging support.