[Superior Safety]The safe charging design will prevent your device from overheating, over current, over voltage, overload and short circuit, the built-in fuse is 10A in the line.[Widely Application]Universal for 12-24V vehicles, adapt to main stream vehicle types such as cars, SUVs, trucks, off-road, RV. Input: 12V/24V (9-36V) DC, Output: 12-24V, DC 20A[Simply installation]The cigarette lighter socket is not surface mounted, only needing a small hole, It is a through hole installation requirin a large (1 1/8″) hole.[Thoughtful design]Nylon housing have effective scratch resistant and this product also design has a PVC/Silicone cap, this cap effectively protects the charger against sudden water splashes and dustproof.[Timely Customer Service]Welcome to contact us if you have any questions or concerns. We will be patient to solve your problem and offer proper solutions for you.