copper output wire and sufficient material & transforming rate Using a new largecapacity large magnetic ring material the performance is very stable. ^^Heavy-duty protections, including Over Voltage Protection, Under Voltage Protection, Over Current Protection, Over Power Protection, and Short Circuit Protection. ^^The efficiency is as as 95%, which can reduce electricity bills. More energy saving! More environmentally friendly! ^^The output does not fluctuate with the input voltage, so you can obtain a highly stable output voltage, really protect the computer. Quiet, perfect for home use^^Support 160V-220V voltage, Supports 8 -end graphics cards.