MAA-KU EC Axial Cooling Blower Exhaust Rotary Fan Size : 4.75" inches (12x12x3.8cm)(120x120x38mm), Material : Thermoplastic, Supply Voltage : 115vac, Color : Black. This axial fan consume very less power & better efficiency than AC equivalent. In this cabinet fan electronic & power transformation are completely integrated within the motor. This cooling fan hasLow motor temperature : for longer lifetime than AC equivalent This exhaust fan has no complicated wiring only attached domestic (110vac) two pin plug with this fan two wires and its ready for operate. Because of 115v fan easily fix anywhere no need of special power source