uxcell Waterproof DC Converter 12V to 5V 3A 15W with USB Output Car Power Voltage Converter Regulator Convert unstable voltage DC 12V to stable DC 5V 3A output. Not Suitable for Apple products such as iPhone/iPad etc... The import high heat conduction organic silica gel filling and sealing technology. IP67 Protection grade, waterproof, moistureproof and anti-shock protection.Built-in over/under voltage input, overload, overheat, and short circuit protection. 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.