Seasonic M12D-850(SS-850EM Active PFC). Nominal power: 850 W, AC input voltage: 100 - 240 V, AC input frequency: 50/60 Hz. Safety: CB, CUL, UL, DEMKO, FIMKO, NEMKO, SEMKO, TUV, Certification: CE, FCC, C-tick. Operating temperature range (T-T): 0 - 50 °C, Operating relative humidity range: 20 - 80 %