... (user replaceable)Triggering Voltage5V Low Voltage TriggerCooling FanYesAuto Power DumpYesOvervoltage / overheating ProtectionYesPower SourceAC 190-240V 50Hz ... Automatic Voltage Regulator CircuitAccessories IncludedReflector, Power Cord(4m),Sync Cord(4m),Model Lamp, ... measurement machine,withstand voltage testing machine, light meter,high pressure machine etc.Material: strict control ...