... 4. Protections: SCP, OPP, OVP, OTP YSV-20 Series (Constant Voltage Type)Waterproof LED Driver 20W(12/24VDC)Typical Feature1. 3 years ... be customized ApplicationSuitable for LED electronic display screen, LED stage lights, LED spot lights, LED bulbs, LED panel lights, LED ceiling lights, LED tubes...etc Parameter CE ... green,low-carbon,erergy-saving,favorable world! 20w constant voltage LED driver 24v