This is a ventilation fan that can be attached to a lighting rail. Body only. ※From the product page※ Prevents root rot and moisture buildup. • Can be installed on ceilings and lighting rails. • Stylish design that blends in with interiors. • 4-stage wind speed adjustment function (strong wind, rhythm wind, weak wind, medium wind). The initial operation after turning off the power will be at the wind speed set previously.