1. Using this flash hot shoe connection, you can use the flash for off-camera TTL flash photography at a distance of approximately 1.2m from the camera, functioning as if installed on the camera's hot shoe. 2. Supports all automatic functions of Canon EOS series cameras and all Canon TTL-compatible professional flash units. 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 settings may cause slight variations in color between the product and the images. Measurement error tolerance is +/- 1-3 cm. Please allow minor dimensional differences due to manual measurement.