1. There is noise when boiling water. Noise is a normal physical phenomenon. Mi Smart Kettle Pro adopts 1800W high-power heating mode, fast heating speed, noise ≤ 60dB (decibel), noise is a normal phenomenon when boiling water, you can rest assured that the use of 2. Noise when keeping warm. Due to the use of Mi Smart Kettle Pro using silicon controlled, heat preservation noise is small.