Upgrade your existing Flashpoint Streaklight to receive signals from the exciting new R2 Radio Remote System. Just plug her in to the USB port on the side of the head and your older Streaklight is now in the R2 family! This receiver allows for Manual power control and triggering in any of the 5 groups of the R2 system. All about the new R2 TTL Wireless Flash System: The R2 TTL Wireless Flash System is the advanced 2.4GHz radio remote that adds camera TTL dedicated custom functions to your multi flash experience. Easy to use buttons command a full range of functions like reliable channel triggering, group mode selectivity, HSS, with powerful signal strength and exceptional stability to your selected camera flash language. LED panels clearly display thestatus of all remote R2 compliant strobes so you always have control of group lighting mastery. R2 wireless communication gives speed of light response to on camera or off camera R2 family devices for a spectacular advantage on the shoot in any environment. 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 camera body with the essential TTL pass-through and laser AF assist and works with the complete family of Flashpoint Speedlights, Monolights and Strobe l