... by a remtoe controller. 2.over-heat and over-voltage 3.Can use with remote control ModelSK-300SK-400SK-500SK-600SK-800SK-1000SK ... -2S1-2S1-2S1-2S1-3S2-3S2-3SOutput power control range6-stop aperture,1/10 energy variable 1.0=1/32,2 ... ,counterfeiting not allowed.Output power 1/32-1/1,6-stop aperature,1/10 energy variable.Accureate output±0.08F,correct ...