It can be ventilated in rainy days, patented technology! Let you enjoy good air even on rainy days! Heavy Dduty strong smoked roof, UV-ray Resistant High speed 1200 revolutions per minute Screen frame has radius corners and consists of two removable pieces. 3 fan speeds reversible airflow design. Built in fuse for circuit protection Fits standard 14″ x 14″opening for easy installation 12V fan controlled by on/off switch fitted to vent Manual lift lid design Specifications Condition: Brand new Mesh Material: Steel Metal Power: 18W Current: 1.6A Voltage: 12V RPM:1200/M Thermostat: 4A Slow Melted Air Flow: Reversible. Size: 14” x 14” opening. Speeds: Three Fan Blade Speeds. Vent Size:42cmx42cmx12cm Material:PC with Anti-UV Package include: 1 x Skylight exhaust fan. Due to time zones, our reply to your questions may not be immediately. If it’s non-workdays, please kindly be patient and wait till Monday. Feedback is very important to us. It is impossible to address issues if we do not know about them!