... stop aperture,1/10 energy variable 1.0=1/32,2.0=1/16,3.0=1/8, ... tube is better flash,long work time and easy to replace.High-effective mode switch ,with large LCD screen. ... Output power can be adjusted to control the flash accuragely.Trigged by infrared ray,valid ... distance is 20mFor your reference:wireless remote control to control from different direction.The stong light stand, ...