• Comes with smart thermostat control 87f, automatically work if temerature high 87F when sunshine.
• 2100RPM Brushless motor, 15 year warranty.
• Adjustable solar panel (any angle), up to 2000 cool sq. ft. off capacity.
• Durable rust-free aluminum ensures long life & no maintenance. No Battery inside,so it's safe for your house
• The Solar Attic Fan is an all-in-one unit that is designed to lower your attic temperatures and stop damage from moisture,good for the environment.

Features:
Active solar powered attic fan product, is excellent at exhausting attic spaces for roofs.Can easily replace standard powered attic ventilators
Adjustable angel pane
9 in Aluminum fan blade
Thermostat O/F at 86°F ± 5°F
Motor:
2100RPM brushless motor
Tightly sealed Aluminum body to dissipate heat & prevent dust infiltration
Exhaust: More than 1300CFM
Warranty: 1year
Note: this attic fan no battery, so you don't need care battery danger.2.Because the exhaust volume is large (Rotation Speed 2100RPM equivalent to other's 35W fans), the fan speed is fast, so the fan will have some noise