Features: 1.Multi Protection: This 550W power supply provides provides protection for short circuit, overcurrent, overvoltage and overload. 2.Auto Break: This gaming power supply automatically cuts off the input to prevent damage to the power supply and circuit when the temperature is too high. 3.120mm Bearing: This desktop system power adopts 120mm bearing with dynamic hydraulic pressure. Output with low ripple and noise. 4.Quiet Fan: This 550W desktop power is designed with quiet and powerful fan with 9 blades, which ensures fast cooling, support discrete graphics card. 5.High Safety: This desktop replacement power adopts circuit protection for OCP/UVP/OVP/SCP/OPP/OTP, safer and more stable. specification:Item Type: 550W Power Supply Material: Aluminium Alloy Voltage: 180-264V Rated Power: 400W Peak Power: 550W Motherboard Interface: 1 x 20+4PIN CPU Interface: 1 x (4+4) PIN GPU Interface: 1 x 6 + 2 to 6 + 2PIN Fan Interface: 2 x Large 4PIN Hard Disk Interface: 3 x SATA Product Size: Approx. 150 x 140 x 85mm / 5.9 x 5.5 x 3.3in ( Manual Measurement, Slight Error May Exist ) PackageList:1 x 550W Power Supply 1 x User Manual