all tests were conducted according to European Norms, EN 60068-2-6 / 60068-2-27 / 60068-2-29 Railway applications – Rolling stock equipment – Shock and vibration tests and therefore are unique to the industrycan be used under extreme conditions (–40 °C … +70 °C)fan design with ball bearing: guaranteed long service lifevoltage range: 230 V / 115 V 50/60 Hz