This underwater slave flash requires no cables and enables divers to capture stunning images even in the darkest waters. The UFL-01 is incredibly compact and light weight. It has been designed and specially customized for use with Olympus Digital cameras and Underwater Housings. Waterproof to 40 meters, this underwater flash is one of only a few that allow TTL underwater flash photography in slave mode - ideal for multiple flash applications and single flash macro shots. Combining the UFL-01 Flash to your Olympus camera and housing will make underwater photography fun for everyone as it improves the over all lighting capabilities underwater. This means greater image quality and makes diving and underwater photography a whole lot more enjoyable.