DUCT RAIL FAN DC plus Φ50 MR-0062D-WH An air circulation item that can be easily installed on the lighting duct rail in your home, store, or office. This high-spec duct rail fan allows you to adjust the airflow in 5 stages and select the rotation direction using the included remote control. By adjusting the airflow, you can enjoy a comfortable lifestyle depending on the season and the situation. In addition, by changing the direction of rotation, you can set the airflow in either the up or down direction, allowing you to experience better heating and cooling efficiency. It also has a swivel function (fixed) so that it can be installed regardless of the arrangement of the duct rails already installed. It is a tool that circulates air effectively to the space you want to target. https://www.fazoo-pl.com/c/mercros/MR-0062D-WH I have used it at home for about a year. The blades will be removed for shipping to prevent damage. Please screw them on in the direction shown in the third photo.