Mini but professional adjustable switching DC power supply.Highly efficient, low ripple, small size and light weight. High frequency operation can reduce the size of power transformer. Zero adjustment for the output of voltage and current. Double LED display of voltage and current, high precision.Voltage stabilization, current limiting, simple operation feature the DC power supply. Temperature control fan heat dissipation, low noise.Double potentiometer, more precise adjustment. Applied in production line test, electrical maintenance, aging products, battery charging, laboratories scientific research and teaching and all other need DC regulated power supply.