This is a good quality, unregulated, very useful, low voltage power supply. It gives the DC voltages as well as AC voltage from 2V - 12V in steps of 2 volts at 5 amps capacity. Voltage is select-able by means of a positive click stop rotary knob on the front panel. Safe and rugged power supply ideally suited for normal day to day use by students. 240V, 50/60Hz. Size 22 x 20 x 13cm. 3 year warranty. Tested to EN 61010 low voltage directives. CE certification.