The Elinchrom BX 500 Ri is in the middle of Elinchrom's range of studio flashes. It has in-built EL-Skyport triggering with 4 groups/8 frequencies for multi studio operations. The Elinchrom BX 500 Ri has variable f-stop steps and to prevent overheating, an in built fan and automatic temperature control ventilation. The Elinchrom BX 250 Ri also hasa rubberised handgrip with a built in fuse storage for those emergencies. A fantastic mid range flash.