Instek GPS-4303 200W Quadruple-Output Linear DC Power Supply, 30V DC, 3 Amp Linear power supply unit provides a constant source of DC voltage and current for powering and testing electronic devices Two outputs supply adjustable voltage up to 30VDC and current up to 3 amp Third output supplies adjustable voltage from 2.2V to 5.2VDC and current of up to 1 amp Fourth output supplies adjustable voltage from 8V to 15VDC and current up to 1 amp Fine and coarse adjustment of voltage and current output