Description Stainless steel Provides 24-hour cross-flow ventilation. Combines rechargeable ni-cad battery with latest solar technology to drive fan motor and charge back-up battery. At night, overcast or shadowing conditions, ni-cad battery powers fan motor. Low-profile 2" high by 8-3/4" in diameter. Baffle design prevents leaking. Runs over 48 hours on a full charge. 2-year limited warranty. Fits a standard Nicro 3" deckplate and require a 3.75" cutout. Includes deck ring, cover and 2 blades. Made in USA.