The Flashpoint R2 SP Single Pin Transceiver extends the power of R2 wireless radio, for manual control within the R2 wireless Family, and adds both transmitting and receiving to any hot shoe flash or strobe equipped with a sync port, no matter the age or version. The single Transceiver serves units slave linked or attached to it, with the fantastic dexterity of up to 5 Groups in 32 Channels with the added security of 99 ID's. Direct Group access opens the way to rapid control without scrolling through choices. The Flashpoint APP (available on the App Store for iPhones or Google Play Store for Android devices) links the Transceiver to your Smartphone for the ultimate in convenience, through a Flashpoint M1 Pro or M1 Mini flash. The wireless range is maximized by its non-TTL simplicity, with up to 492 feet / 150 meters of clear signal under ideal conditions. One unit can act flawlessly as a transmitter or receiver, or both, reducing your inventory while increasing your remote wireless light force. The R2 Fine Family of Flash power settings can be Manually controlled and triggered with utter confidence. 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 widely acclaimed 2.4GHz R2 Radio Remote System wireless radio triggers transmits atop a camera body and works with the complete family of Flashpoint Speedlights