strobe flash,CM-800TOUCH-SCREEN STUDIO LIGHT 1.Self pulg-in flash tube is of better flash 2.longer work time,and is easy to replace. 3.5-stop aperture,1/10 energy variable,1/32-1/1(infinitely variable) 4.Digital temperature controling system,over-heat protective device. 5.Intelligence cooling -fan system. 6.Originate music tone. 7.Large LCD touch-screen operation system. 8.Child satefy key.