Power pack inverter Li-ion battery 1.Flash power of single flashlight's power pack:300w/400w/500w/600w/1000w 2.Flash power ofdouble flashlight's power pack:300w*2/400w*2/500w*2/600w*2/1000w*2 3.output power of the modeling lamp:travel flashlight's power supply30w,studio flash light's power supply is 150w 4.output power control range:5-stop aperture,1/10 energy variable,1/16-1/1 5.Voltage:180v-250v,50HZ/100V-120V,60HZ. 6.Each one with over-heat and over-pressure protective circuitry,and a cooling fan