Samlex SEC-1235 Desktop 30A Switching Power Supply, Advanced switch-mode technology, Reliable power with minimum weight and size, Circuit innovations minimize output voltage ripple and RFI Provides a highly regulated output DC voltage of 13.8 Volts at 30 Amps with an AC input of 120 Volts, 60 Hz Advanced switch-mode technology, Reliable power with minimum weight and size Circuit innovations minimize output voltage ripple and RFI Input voltage can be set at 120VAC or 240VAC (internal jumper) UL listed to both USA & Canadian safety standards