1,The original cord material is 10M, but when the factory made it curling,the actual useable length can not reach 10m.
2,Most Yongnuo flashes are not compatible with TTL cord, if your flash is Yongnuo brand, please don't choose this cord.
This TTL Remote Cord provides full TTL control for Canon Speedlites when used off-camera with Canon cameras which have the TTL hot flash shoe. It permits easy use of flash when the camera is mounted upon a bracket.
This cable has a shoe mount on the bottom of the flash connection shoe, as well as a 1/4"-20 socket.
Cable Unstretched length: 1.4m(4.6ft )
Dimensions (L x W x H)
Camera connector: 39.3x29.5x27mm
Flashlight connector: 39.1x29.5x23.5mm
DSLRKIT TTL-C(10Meter) TTL Flash Cable x1
Suitable for DIGITAL SLR cameras:
All EOS Cameras except for the EOS 630 and RT
Powershot G15 G12 G11 G10 G9 G7
Compatible with aLL CANON Brand and other Manufactures CANON compatible flash units,including 220EX, 270EX, 300EZ, 380EX, 420EZ, 420EX, 430EZ, 430EX, 430EX II,480EG, 540EZ, 550EX, 580EX, 580EX II; Most Yongnuo flashes are not compatible with TTL cord, if your flash is Yongnuo brand, please don't choose this cord.