The renowned ebm-papst range of fans is based on experience gained from decades of development know-how, millions of units in series production, and the innovation competence of a world-wide technology pioneer. Most incorporate the world-famous ebm-papst external rotor principle where the fan blades are directly attached to the external rotor motor. High product quality Can be operated at 50 or 60Hz Bearing Type Ball Fan Type Tubeaxial Noise 45.0 dB(A) Power (Watts) 18.00W RPM 3100 RPM Termination 2 Terminals Operating Temperature -40 ~ 185°F (-40 ~ 85°C) Long service life Sturdy construction Terminal power connection IP20 protection rating