The CF-600 Underwater Sport Housing for Canon Speedlite 600EX-RT Flash from AquaTech is a waterproof case specifically designed for the Canon 600EX-RT flash unit. It has a depth rating of 33' (10 m). Mechanical push-button controls permit access to virtually all flash functions, including every essential one. The housing features a polyurethane body and an acrylic back plate. Inserts, screws and buttons are constructed from stainless steel. The E-TTL bulkhead, made from anodized aluminum, enables full E-TTL exposure control.