Key Features High Fidelity SoundHeadphone (1) is engineered for efficient sound delivery and vivid bass thanks to the custom-made 40 mm speaker and high-linearity suspension system with PU surround. The PU surround moves more effectively than traditional materials like PET, creating deeper, richer tones in the low frequencies. Its 8.9 mm width exceeds industry norms, minimising distortion and keeping the driver stable to cast precise vibrations. For clear vocals, vibrant mids and an overall enveloping sound.  Sound By KEFThe sound of Headphone (1) is acoustically engineered in partnership with KEF, a historic name in audio with over 60 years of expertise. Using KEF’s advanced tools and deep knowledge, the sound profile is crafted to reproduce music as the artist intended. Known for precision and natural balance, KEF brings a level of refinement that enhances every listening session. The result is immersive audio that feels detailed, lifelike, and true across every genre. Escape The NoisePure sound, without the commotion. Advanced hybrid Active Noise Cancellation uses dual feedforward and feedback microphones to reduce noise effectively. It checks your surroundings every 600 ms and adapts the cancellation level in real time. Wearing detection runs every 1875 ms to keep playback seamless and intuitive. Up To 80hrs Of PlaybackHeadphone (1) is designed to keep up with your day. Enjoy up to 35 hours of playback with Active Noise Cancellation on or extend it to 80 hours with ANC off. A quick 5-minute charge gives you up to 5 hours of listening, so you’re always ready to go. Chatgpt IntegratedAccess ChatGPT on your Nothing device, anytime, anywhere. Compatible with Headphone (1) and easy to set up in the Nothing X app. What’s in the box:HeadphonesProtective soft caseUSB-C to USB-C cable3.5mm to 3.5mm audio cableSafety and warranty information & User Guide