High-power two-knob numerical control switching power supply, four-digit LED intuitively display voltage, current, output power and output equivalent impedance, with 10mV/10mA resolution; coding switch digital control output size, convenient and durable; with short circuit, overvoltage, overvoltage Current, over power, reverse polarity protection functions. High output efficiency, one-button control output on-off switch, convenient and safe. Support optional RS232, RS485 and USB serial port communication, support MODBUS RTU protocol, realize automatic control; widely used in product aging maintenance, battery charging, experimental testing, production testing, electrolytic plating and other industries.