Flashpoint R2 TTL Transmitter and Receiver Kit for Canon The Flashpoint R2 Kit is the ultimate radio system for Canon EOS DSLRs that connects to all strobes with sync ports but communicatesto the whole R2 family including Flashpoint Streaklight, ZoomLi-on and Zoom and Canon speedlights using the Canon ETTLII protocol without missing a beat. The incredible range of these compact and lightweight units as well as their integrated functions and features make them the first choice of professional photographers. The proprietary TTL and HSS enabled 2.4GHz R2 Radio Remote System radio triggers transmits atop a Canon EOS body with the essential TTL pass-through and laser AF assist and works with the complete family of Flashpoint Speedlights, Monolights and Strobe lights with R2 TTL radio transceiver built right in. All the R2 enabled family communicate seamlessly: the lithium powered Zoom Li-on Canon, Nikon, and soon, Sony TTL speedlights, the Zoom M alkaline energized speedlight, the fantastic Streaklight 360 Canon and Nikon TTL powerhouse, and the masterful 600ws XPLOR600monolights. Older Flashpoint flashes can be fired and controlled off camera while being attached to the R2 Radio Remote Receiver FPRRR2RC to grace remote link to earlier models. To compliment the traditional Canon A:B C group ratio style interface, the R2-C provides a full proprietary GR Group style interfaceallowing up to 5 Groups to be indivi