uxcell Power Converter Regulator DC 12V/24V(9V~35V) Step-Down to DC 5V 20A 100W Waterproof Voltage Convert Transformer Waterproof IP68 Voltage Converter Regulator DC 12V/24V(9V-35V DC) to DC 5V 20A 100W. Protections: Over-load, Over-current, Over-temperature, Short-circuit, Over-voltage. Auto-recovery when device is back to normal operating; high transfer efficiency of 94% max.. Die-cast aluminum shell, anti-shock, and moisture-proof and has stronger durability.New and Old label is being changed, but the products are same. Note: It is recommended to use stable DC power for the input power supply If you use the pulsed DC power provided by the generator, please filter it with capacitor before connecting it to the converter. If you use solar panel to supply directly, please note that the open circuit voltage of the solar panel cannot exceed the maximum withstand voltage of the converter. The supply voltage should be within the rated voltage and always leave a certain margin.