Internal power supply for personal computer, 550W power, input voltage 230 Vac, 50/60 Hz, conforms to ATX 12V v.2.31 specifications, main switch, surge protection, overload protection, short circuit protection, high MTBF, high reliability, quiet operation, 12 cm silent fan, temperature control of the fan speed, Flat type connection cables from 500mm to 800mm, 1 x 20+4-pin connector, 1 x 12V 4+4-pin connector, 1 x 6+2 PCI-E connector, 2 x Molex connectors, 4 x Sata connector, dimensions 150x140x86 mm, weight 1.0 Kg, black color, CE certification, RoHS.