Mid-range portable flash unit that replaces the popular Speedlite 430EX-III RT. A great flash for photographers wanting to expand their creative abilities, or to step-up from a basic flash unit. Utilizes Canon Multi-function Shoe connection and is compatible with the EOS R3, EOS R6 Mark II, EOS R7, EOS R8, EOS R10, and EOS R50 Mirrorless Digital Cameras. Guide Number is about 82.7, in feet — in other words, at ISO 100 and at f/4, it can illuminate a subject about 20 feet away. E-TTL automatic flash with any compatible R-series mirrorless camera, full Manual flash control, and Flash Exposure Memory.