DC Constant voltage/Constant current .High efficiency ,High power factor , High credibility .Over current peotection Function :Constant current /Constant voltageOutput power:36WInput vol:AC90-305VOutput:DC20/40V Output current:0. ... Over current peotection,over and under voltage ,short circuit,over temperation,thunder-proof protection. 4.Water-proof , Dust-proof, Damp-proof. LED Power Driver with UL ...