Spire Jewel 420Watt . Nominal power: 550 W, AC input frequency: 50 - 60 Hz. Colour of product: Grey. Noise level: 21 dB. Mean time between failures (MTBF): 100000 h. Safety: UL, FCC, CE, CSA, TUV This is an auto-generated long summary based on the first three features of the first five feature groups.