Fits standard 40CMx40CM opening for easy installation. 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 15.7″ x 15.7″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: 15.7” x 15.7” opening. Speeds: Three Fan Blade Speeds. Suits hole size: 40cm(15.7″)x 40cm(15.7″). Vent Size:46cmx46cmx17cm Material:PC with Anti-UV Colors:Transparent color. Package include: 1 x Skylight exhaust fan.