High efficiency. Low Ripple & Noise. Resettable power shut-down AC input full range. Internal 8cm fan Input voltage: 230 VAC Input frequency: 50 to 60 Hz Watt: 300 Over voltage protection: +3.3V +5V +12V Operating temperature: 0˚ to +40˚, Storage temperature: -20° to +80° MTBF: 100,000 hours at full load