Roof Vent Crystal Turbo Fan Camper Van Motorhome Caravan Skylight Vent+LED. Equipped with stainless steel insect screen. Motor made of pure copper core, reliable and highly efficient. Fan with 10 blades, running more stable and more quiet. Water proof and sound proof, hard to age. In air with 2 speeds and out air with 3 speeds. CFM: L speed 270 CFM. M speed 550 CFM. H speed 750 CFM. Lid material: High quality PC material with UV protection. 1 Roof Ventilation Fan. Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Should you change your mind and wish to return your item, this can be done if you notify us within 30 days of receiving your item. Our warehouse is located in UK. We are sure we will try hard to help till you are satisfied!