I am selling an Orion step up dc/dc converter.  It measures roughly 3 1/2" x 3 7/8" overall.  The input is 9 - 18v with an output of 24v - 7a max.  It is used and in great working condition, and comes as shown in pictures.  For more information please contact a dealer in your area.  ( KW / 12 B / 9046295 )  (2) / LH