VEVOR Electric Trailer Jack, 5000 lbs, Heavy Duty RV Electric Power Tongue Jack with 2 Way Connector, Manual Crank Handle & Weatherproof Jack Cover, 10"-28.3" Lift, for RVs, Trailers & Campers, Black

Does the trailer jack come with its own mounting bracket?

How long is the warranty I have a single axle caravan that weighs 2600kg, the tow ball weight is 250kg. Does that mean I can use the smaller jack