The TecPel Linear D.C. power supplies have the following features and benefits: triple output, auto tracking, an auto series and parallel operation, a constant voltage and constant current operation, a low ripple and noise operation and an overload and reverse polarity protection. Also has a 1/2 Digits 0.39" LED display. Also has a 5V and a 3A fixed output. Robust and reliable, and engineered with longevity in mind.