Features Overcurrent protection,more safe and reliable to use. Step down voltage adjustable, can be used as battery charger, constant current LED driver module. LCD display, dual display of voltage and current. With short circuit protection and input reverse polarity protection. Wide range of output voltage,large output current and has a maximum conversion efficiency of 95%. Specification:Item Type:Power Supply Module Model:WD5020 Input Voltage:7~50V Output Voltage:0~36V Continuous Adjustable(Can only be used as a step down module, the input must be greater than the output 1V or more) Output Current:Adjustable,20A Maximum(It is recommended to use it in 15A. It can naturally dissipate heat at 10A or below 140W. If it exceeds, please strengthen the heat dissipation! Constant current requires output voltage of 2V or more to adjust. Current regulation can only work under constant current state.) Output Power: Up to 300W (recommended to use within 250W, please reduce power when using large differential pressure) Working Temperature: -20~+75 ℃ (pay attention to the power tube temperature when using, please strengthen the heat dissipation) Working Frequency: 300KHz Conversion efficiency: up to 95% Short Circuit Protection: Yes, constant current value currently set by constant current Input Reverse Connection Protection: Yes Output Backflow: No, please add a diode for charging! Wiring Method: Terminal block or soldering terminal, VIN is input, VOUT is output Size:100 x 60 x 48mm / 3.94 x 2.36 x 1.89in Package List:1 x Module Note:1.The output voltage cannot be adjusted because the default output voltage of the module is about 20V when it leaves the factory. When you encounter this problem, please rotate the CV potentiometer more than 10 times counterclockwise until the voltage value changes, and then use the module to adjust the voltage normally.2.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List 1 x Module