Upgrade your Flsun S1 (Pro) 3D printer with this Silent Module, which will further reduce the noise during 3D printing. The high-pressure cooling fan ensures more efficient heat dissipation. In addition, the air duct has a larger diameter and the noise of the impact on the fan housing is reduced by the large impeller design. The damper design reduces friction between the airflow and the pipe for improved airflow consistency. This reduces the noise level to a maximum of 55 dB.