1.Short circuit / Overload / Over voltage protection 2.100% load test 3.dimming control 4.CE,ROHS,IP67 5.3-year warranty 3Features Universal AC input / Full range Protections: Short circuit / Overload / Over voltage High Power Factor / Low Harmonics(THD) IP67 design for indoor or outdoor installations High reliability and long life guarantee Suitable for LED lighting and moving sign applications ...