The Canon AD-E1 Multi-Function Shoe Adapter is ideal for Speedlites and shoe-mounted accessories like the EL-1, 600EX II-RT, ST-E3-RT, OC-E3 Flash Cord, and others. This adapter is completely weather-sealed and offers a secure connection to current updated shoe type. This adapter can also be used with other shoe-mounted accessories, such as shotgun mics or on-camera lights, and features dual-locking pins on the Multi-Function Shoe side for a secure attachment.