Hybrid Active Noise Cancellation: CMF by NOTHING uses hybrid ANC technology. To cancel out noise up to 45 dB deep, Buds Pro use three microphones inside and outside the earpiece. It can identify and successfully remove a wider variety of noises thanks to its incredibly broad frequency range, which reaches up to 5000 Hz. You can lose yourself in your favorite music whether you're in a noisy office or on a hectic commute. Transparency Mode, on the other hand, allows you to listen to outside noises while still enjoying calls or music. Ultra Bass Technology: The CMF Buds Pro Bluetooth earbuds improve the bass experience by identifying music signals and ensuring that hardware and software cooperate to present a clearer bass and enhance bass sound in real-time.