The Elinchrom RQ Ringflash can help you achieve a shadowless image in your photographs. Since this 4-pole flash tube runs on Ranger Quadra battery power packs, it is ideal to carry out on location.The Elinchrom RQ Ringflash has 1/2600 second flash duration and it is delivered at maximum powerAn internal diameter of 3.9" (100 mm) provides a convenient slot for medium format or SLR camerasThe 6.5' (2 m) long cable and ergonomic handgrip make for easy movementThe weight of the Elinchrom RQ Ringflash is 4.1 lbs