Solar Panel Powered Ventilation Equipment For Greenhouse Fishing Description: [Efficient Ventilation]: With a 4-inch straight fan and a high efficiency of 130CFM, this fan can effectively remove heat and moisture from the interior, keeping the room air fresh. [Silent Operation]: The fan features a quiet design that produces minimal noise during operation, so it does not interfere with everyday life ani work. [Wide Application]: Suitable for various settings such as yachts, camping vehicles, kitchens, engine rooms, etc., meeting different needs of users. [Easy Installation]: Installation of this exhaust fan is simple and can be done by the user without professional assistance. Made of monocrystalline silicon and ABS material, it can withstand long-term use in a variety of environments. [Automatic]: The fan operates automatically with sufficient sunlight, without manual operation, for convenience and practicality. Solar power eliminates the need to connect power, which avoids wiring problems. [Improved Air Circulation]: Thanks to its operation, the exhaust fan effectively improves air circulation in the room, increasing the level of comfort. Size Chart: : 9,5 cm x 15,5 cm / 3,74 inch x 6,10 inch Fan: 16,5 cm x 12,5 cm / 6,50 inch x 4,92 inch The package includes: 1 1 fan