Need to be used with a controller, suitable for retrofitting Model:UF-SL120-1B Fan Size:122.8X 122.4X 25MM Rated voltage:DC 5V (LED) & 12V (FAN) Rotating speed:800~ 1900 RPM Wind pressure:2.54MM H2O (MAXIMUM) Air volume:58.54 CFM (MAXIMUM) noise:17~31 DB Rated current:>= 0.5MA Bearing type:FLUID DYNAMIC BEARING (FDB) Operating Voltage:DC5V & 12V Starting voltage:DC 6.0V Input Current: 0.18A(FAN)/ 0.6A(LED) input power:3.5WAT