1. Durable and well made. 2. Eco-friendly and harmless to human. 3. Color: White 4. Voltage: 12V 5. Speed: 1800 rpm 6. Air volume: 60CFM 7. Installation: (1). Opening size: diameter 118mm(the extension pipe can use a hose with an inner diameter of 120mm or a PVC pipe with a diameter of 110mm) (2). Out of the roof: height: 53mm; width: 150mm (3). Installation thickness: 80-160mm adjustable (4). Connection: Red wire(+); Black wire(-)
