1. Using this flash hot shoe connection, you can use the flash for off-board TTL flash photography at a distance of approximately 1.2m from the camera, providing performance equivalent to being mounted directly on the camera. 2. Supports all automatic functions of Canon EOS series cameras and all Canon professional flash units with TTL functionality. One end connects to the camera's hot shoe, and the other end connects to the flash unit. Includes a secure locking mechanism to prevent accidental detachment. 3. Compatible with all Canon EOS series film and digital SLR cameras (excluding EOS 630/RT). Compatible flashes include Canon 580EX II, 580EX, 550EX, 430EX, and other compatible models. Product Name: OC-E3 Off-Camera Flash Cord Color: Black Material: Plastic Package Contents: 1 x Off-Camera Flash Cord Note: Light reflection and differences in display screens may cause slight variations in color between the product image and the actual item. Measurement may vary by +/- 1-3 cm.