Features: 1. Single output, high precision, high reliability, low ripple and noise2. 3LED digital display voltage and current values with mA3. With voltage / current coarse adjustment knob, can adjust the voltage / current value accurately4. Constant voltage constant current operation mode, can be automatically converted5. With current limiting protection6. Excellent qualityApplication range:1. For teaching experiments, research2. Testing and aging for electronic production line products3. For the repair of communication equipment4. Other areas that require DC regulated power supplies 30V 20A power supply 0-30V Adjustable0-20A Adjustable Technical Parameters Input voltage: AC220V10% 50HzWorking temperature: -10 C -40 C Relative humidity <90%Storage temperature: -10 C -70 C Relative humidity <80%Regulated state: Voltage stability 0.01% + 3mVLoad stability 0.01% + 5mVRecovery time 100usRipple noise 1mVrmsTemperature coefficient 300PPM/CSteady flow state: Current stability 0.2% + 3mALoad stability 0.2% + 3mARipple noise 3mArms (effective value)