1.Class I structure Input Voltage:100-277V~50/60Hz 2.Efficiency 88% 3.Constant power drive, Constant current output control mode 4.Metal clad Contruction,level of protection:IP67 5.Lighting protection level: difference module 4kV,common mode 6kV 6.Long life design, 5years warranty Output current can be adjusted Externally 7.The dimming function: Three in one dimming (only S series)