Quantums Qflash T5d-R series is the latest evolution of Quantums proven portable Qflash units. The T designation indicates that it is powered by any Quantum Turbo battery (not supplied) giving a maximum power output of 150 Ws. The T5d-R is equally at home in the studio as it is on location, a Turbo AC conveniently converts a Qflash T head into a mains powered flash; making it ideal to be used in the studio or at an indoor event. When used with Free Xwire, the new Qflash 5d-R now supports wireless control of all dedicated camera flash functions; including Manual, TTL, Auto, Auto-fill & TTL-Ratio up to 500 feet away! The Qflash T5d-R blends seamlessly with Canon, Nikon & other professional digital camera systems, using Quantums proprietary QTTL adaptors. In some cases, it even provides capabilities a camera system may not support; such as wireless remote Fill-Flash! All Qflashes can be upgraded as new features come along.