The Ranger Quadra Pro has the highest power output of the Quadra series, is small enough to be handheld, or mounted on a flash bracket, and is perfect for general purpose photography. It can be used for Hypersync/Hi Sync photography but if thiw is a feature which is most important, note that the Quadra HS version has been optimised for this. The Intelligent slave cell has red-eye preflash detection plus programmable and pre-set effect modes. A daylight balanced LED modelling lamp is bright enough to use as a continuous fill light – useful for DSLRs with video capability. Light duration is programmable.