This is a one-of-a-kind custom - designed CheatSheet for the Canon 430EX SpeedLight. Professionally designed by a photographer - for photographers. It's an easy to take with you quick reference that is invaluable in the field. It contains almost the entire manual in a concise, easy to understand, take it with you format. This CheatSheet is a double-sided full sheet of a 4 x 7 1/2 brochure paper. Itis laminated with a heavy ultra-clear 10-mil laminate making it very durable. Itfits easily in most camera bags or shirt pockets.