Wide-range output mini programmable switching DC power supply, standard RS485 serial port communication, support MODBUS RTU protocol, four-digit LED intuitively display voltage, current and output power, with 10mV/1mA high-precision resolution, output voltage and current can be preset ; A single power supply can meet the test of different DUTs with high voltage and low current or low voltage and high current, which greatly improves the application range. The overvoltage protection and overcurrent protection thresholds can be set arbitrarily from 0 to the maximum rated value, and the three groups of data storage and calling are convenient and quick. Widely used in product aging maintenance, battery charging, experimental testing, production testing, electrolytic plating and other industries.