... 3.CE,FCC,ROHS approval 24V 20W electric motor waterproof led power supply SpecificationModelLPV-20-12LPV-20-15LPV-20-24DC output ... inspection: to make sure every unit with power ,without low voltage, without bad led indicator, low ripple, good appearance, with right cables ... to make sure every unit with power, no high voltage, no low voltage, no bad led indicator, low ripple, with right cables , ...