Model SPD-550AH2NKB Type ATX 12V v2.3 and EPS v2.92 Max. Output Capacity 550W Peak Output Capacity 660W Color Black PFC (Power Factor Correction) Active PFC Power Good Signal 100-500 msec Hold Up Time > 16msec at 70% of full load Input current 10A max. Input Frequency Range 50Hz - 60Hz Input Voltage 100V - 240V Operating Temperature 5oC to + 40oC Operating Humidity 20% to 85%, non-condensing Storage Temperature -40oC to + 55oC Storage Humidity 10% to 95%, non-condensing Cooling System 12cm Hydraulic bearing fan Efficiency Meet 80 PLUSBronze at 115Vac input. MTBF 100,000 hrs minimum Safety Approval CE/CB/TUV/ UL/ FCC/ BSMI PCI-E 6+2pin 2