1、LCD digital display, can display input and output voltage, output current and output power. 2、Input end anti-reverse connection protection, reverse connection will not burn out. 3、It can used for voltage boost and buck, the output voltage can adjusted arbitrarily from 0.5 to 30V, and the current can adjusted arbitrarily from 0 to 4A. 4、The voltage boost and buck chip is used as the main controller, external 60V 75A MOS tube is used as the switch tube, double 60V 5A SS56 schottky is used as the rectifier, with sufficient voltage resistance and sufficient power. 5、Output ripple small, with LC filter. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.