Elinchrom EL 20751KIT Style 500/500 BXRi To Go Kit Built-in Skyport Triggering ? Using a Skyport Trigger can completely control the BXRi including power up and down and turning on/off modeling light Visual Flash Confirmation ? Modeling light can turn off until flash is ready to fire. Eye-Cell ? When using BXRi?s in optical slave mode with cameras or pocket flashes with a pre-flash, user can program the number of pre-flashes Power & Modeling Lamp Steps ? Can modify 1/10 step increments to any 1/20, 1/30, ? 1/90, 1 stop. Complete 2 head kit.