It supports active noise cancellation with a maximum of 45dB. We recommend that you download the Nothing X App, go into the app and check the ANC settings in the Noise Control section. This setting offers multiple effect options such as "High/MID/LOW/Adaptive". At the same time, we kindly remind you that if the ear tips are not worn properly, resulting in poor airtightness for noise cancellation, it will also cause the noise cancellation effect to be poor or ineffective. The Earbuds come with ear tips of different sizes at the time of delivery, and we recommend that you try replacing them with different ear tips.