fixed type:voltage 12V,24V current 1A,2A,3A .....up to 50A HB17...G series ... -60HZ Waveform and noise: CV≤1mVrms, CC≤5mArms Output voltage: 12V or 24VWorking time: uninterrupted for a long time Output current ... ±40°C Relative humidity: ≤90% DC Power Supply fixed type 12V,24V