• This new Ring Lite for close-up and macro shooting is loaded with features and capabilities. Incandescent focusing lamps and two forms of modelling flash permit preview of lighting effects. Illuminated LCD panel for easy flash settings in any lighting condition• Now with Canon\'s E-TTL, it takes full advantage of the flash performance of the EOS-1v, EOS-3, and other E-TTL cameras. • Circular twin flash tubes can fire at even power, or varied between them over a six-stop range, and one or more 550EX Speedlites can be used as wireless slaves along with the MR-14EX. • The controller unit now has an illuminated full-info LCD panel and its accepts optional hi-capacity battery packs.• Twin-tube ring lite designed for close-up photography with EF Macro lenses; Flash tubes can fire together or independently. • Compatible with all EOS bodies. • Supports E-TTL Wireless Autoflash in conjunction with one or more 550EXs.