Cables & Cords The Canon IFC-40AB II USB Interface Cable enables you to connect WFT-7A (ver.1) wireless transmitter to your EOS 7D Mark II camera. The WFT-E7A (ver.1) wireless transmitter can be used with the EOS 7D Mark II camera if upgraded to firmware Ver. 1.1.0 or later and using separately sold Canon IFC-40AB II USB Interface Cable or Canon IFC-40AB II USB Interface Cable.