DROK 180081 Numerical Control Step Down Voltage Regulator Stabilizer, DC 6-55V to 0-50V 5A Constant Voltage Current Buck Power Converter Voltage Transformer DROK DC converter is the combination of analog integration and digital control. Its adjustable output voltage range is 0-50.00V, step by 0.01V; its adjustable output current range is 0-5.000A, step by 0.001A. Date Store: this electricity converter owns power-down stored function and can store 10 groups preset value, besides, it can quickly extract two groups stored value. Color LCD Display: our voltage stabilizer is equipped with high quality LCD monitor. Through the LCD screen, it is convenient for you to check the preset voltage, input voltage, output voltage, the preset current, output current, output power, etc. Cooling Function: the step down voltage converter has an intelligent long-life ball bearing fan which can turn on automatically when the output current is higher than 0.5A, effectively dissipate heat and provide stable high power output. Note: please note that 55V is limit maximum voltage, please leave some room to use, otherwise it may be damaged; the input must be DC-DC, it will be destroyed if use AC 220V as power supply directly.