The Mean Well RPS-400-12-SF is a 400 watt, 12 volt, single output power supply. It has a wide input voltage range of 90-264VAC, a wide adjustable output voltage of 1-12V, and an efficiency rating of up to 91%. It is UL, CUL, TUV, and CB approved, and carries a 2-year warranty. This power supply also features a built-in active PFC function, making it ideal for high power applications in medical, industrial, and ITS fields. It also includes the safety features of short circuit, overload, and over voltage protection.