Product descriptionSpecification: Model:GS-400II Max Power(Ws) : 400Ws Guide Number (m ISO 100) : 65Color Temperature :5600+-200K 0.3 - 1.5 Sec Recycling Flash Duration:1/2000 -1/800s Optional X1, FT-16, XT16 Transmitters ,Xpro100-120 VAC or 220V-240V1/32 to 1/1 Power Range 150W Modeling Lamp Anti-Pre-flash Function Umbrella Input and Stand Mount Flash Variability: 5.0-10(1/32-1/1)(50 steps in 0.1 increments) 3 Modes: 3 Modes Changeable Reflector:yes Fuse: 8A Flash Ready Indicator: Buzz sound Triggering : Sync cord, test button, slave triggering, wireless control port for optional radio system Wireless Control: Wireless Control Built-in Godox 2.4 GHz X System, 32 channels with 16 groups Package included: 1 x Godox GS-400II1 x Standard reflector 1 x Glass protection cover 1 x Modeling lamp 1 x Instruction manual