Quantity: 1, Color: Black,Instructions: Turn off the power of the camera and the on-camera flash, insert the flash hot shoe into the A-end hot shoe socket of the TTL cable, insert the B-end hot shoe socket of the TTL cable into the hot shoe socket of the SLR camera, turn on the camera and flash to use.Compatible cameras: All Canon EOS cameras, Nikon D series digital SLR cameras, Nikon Z6, Z7. Except D2000 / EOS 630/EOS RT/EOS M10.Compatible flash units: Canon flash units such as 600EX II-RT, 600EX-RT, 430EX III-RT, 430EX II, 430EX, 270EX II, 270EX, MR-14EX II, MR-14EX, MT-24EX, 320EX, 90EX, 550EX, 580EX II, 580EX, 420EX and other brands of flash units that are compatible with Canon E-TTL or E-TTL II.Nikon Speedlights, such as the SB-5000, SB-800, SB-910, SB-900, SB-800, SB-700, SB-600, SB-400, SB-80DX, SB-28DX, SB-28, SB-27, SB-26, SB-25, SB-24, SB-22 and other brands of Speedlights that are compatible with Nikon TTL.