Laboratory Power Supply, DC 0-30V 0-5A, 5V 3A, AC Insulated from the Mains 0-250V 4.5A, Rack 19" 3U 2 in 1 laboratory AC power source combined with DC power supply. Constructed under consideration of the high safety requirements in the research, science investigation, servicing, education and industrial fields. The high-precision DC regulated power supply provides 2 adjustable outputs, one is the DC adjustable and the other the AC adjustable output, designed in high stability and performance circuit. Volt and Amper meters (3 digits LED) for indicating each of the two outputs with high accuracy and one fixed 5 V output are available. Due to the single chip integrated regulator, this output has good stability and ripple factor.