The Quantum XB5 is a short power cable for connecting the QB1 Compact and Bantam Battery to a Flash. The connection is made through the Battery Compartment in the flash. It is designed to be used with the Canon 580EX, the Vivitar 730AFC flashes.
Compatible with the following flash models:
580EX,APZ 99C,5550DX, 5750DX, FTD5600M, 5700M, 5950, 6500M, 7000M,QTB9500A,730AFC