... .good quality and low cost 3.overload,over circuit,over current,etc.. 4.0.91 power factor,95% efficiency 4000ma led driverPF ... Voltage Range90-265VFrequency Range50~60HzInput Current DC OutputOutput Voltage30-50VOutput Current 4000mA Rated Output Power200WAutomatic ProtectionOver Voltage & Current / Short Circuit / High TempProtection ResetAutomaticImportant ...