MOISTURE PROOF: 90mm 9cm moisture-proof fan designed for humidity area or electronics equipment cooling,especially for some DIY cooling in green house,wet place or device fan replacement.What is Ingress Protection IP Rating:The fans are around IP44 rating. DEMENSION: 12V 90x90x25mm(3.62*3.62*0.98inch)dc fan 0.2A at noise level around 37.5dBA ,speed 3000RPM airflow around 48.2cfm can satisfied with daily cooling but not noisy. 2PIN 2WIRE CONNECTOR: 92mm 12v dc fan with 2pin XH2.54 connector(can not work for pc case unless you do some revision),easy installation and operation. VOLTAGE SPECIFICATION:The 90mm fan can be worked from 7V-12V ,if with 7v , speed at 2000rpm whisper quiet ,at 12v ,full speed at 3000rpm ,high aifrflow but little noisy. VALUE 2-PACK: It comes with 2pcs 90mm 9025 fan ,you will get 2pcs fans for replacement.