The Qflash TRIO "BASIC" is a more affordable speedlite. It includes Qflash TRIO features, full TTL dedication for Nikon DSLR's, High Speed Sync, without a built-in FreeXwire TTL radio. Slip it onto the camera hot-shoe, connect any Turbo Battery, and shoot flash photos non-stop, 24 hours-a-day without slowing down or overheating. Pros worldwide depend on Qflash for high quantity rapid flash firing