INTRODUCTION: The series of switching power supplies for measuring instrument have ruled out the inconvenience of bigvolume and heavyweight of a traditional power supply possess. Four adjustment buttons ,The output voltage and current respectively is controlled by two variable resistors with coarse and fine regulation for morehandy and precise adjustment. 1.Have complete operating protection function.over temperature protection,overload protection,short circuit protection. 2.Small size, low ripple,light weight and high power density,Highly efficient. 3.Voltage stabilization, current limiting, simple operation. 4.Constant pressure and constant current switch automatically. 5.Three LED display of voltage, current and power, high precision. 6.Temperature controlled fan heat dissipation, low noise, long life. 7.Four potentiometer more precise adjustment. 8.Dual voltage input and convenient choice. 9.Output Voltage ranges from 0 to rating voltage with continuous adjustment . 10.Output current ranges from 0 to rating current with continuous adjustment 11. AC 110v and 220v can work , rest assured to choose. Product Functions: 1. Production line test. 2. Mobile phonemaintenance, computermaintenance, electrical appliance maintenance,Car DVD, car audio. 3. Product aging, electroplating,such as resistors, capacitors, relays, DC motors, LEDs, etc. 4. Charge the battery. 5. Laboratory, scientific research teaching,factory, maintenance power supply.school laboratories scientific research and production line use 6. All other occasions requiring DC power supply.