Features: Solar Powered Roof Vent with Universal 110mm/160mm Duct Compatibility Energy efficient, low noise design operates automatically under direct sunlight, eliminating wiring or battery needs. Features a brushless motor, insect proof mesh, and practical aluminum alloy construction for sturdy, maintenance free ventilation in diverse environments. Ideal for recreational vehicle owners, greenhouse growers, warehouse managers, and homeowners seeking user friendly airflows solution. Perfectly suited for kitchens, pet houses, bathrooms, security booths, and agricultural structures requiring heat extraction without electricity. Automatically activates within 20 seconds of sun exposure, providing quiet yet powerful airflows management while resisting corrosion and damage. Specifications: Material: Aluminum alloy Type:15W/8W(Optional) 15W Size: Approx.240x240x55mm/9.45x9.45x2.17inches 8W Size: Approx.300x300x55mm/11.81x11.81x2.17inches Package Includes: 1Pc Solar Powered Roof Vent Exhaust Fan note: Please allow 1 to 3cm error due to manual measurement, please make sure you do not mind before you bid, Due to the difference between different monitors, the picture may not reflect the actual color of the item.