SSLHONG DC 12V/24V Input to DC 5V Output 3A 15W USB C Step Down Converter Buck Module

Will this work with 12 volt fan

Are these rohs and reach compliant?

Do i get the power to connect from the 12v lighter plug or 110v on my f150 truck? i'll be using it for qi charger.

Is this converter waterproof/weatherproof? I would like to use it on a boat where it can be exposed to the elements.