Yes, the 5GHz radio on the ENH700EXT does have the option to set the operation mode to Client Bridge.
However, only 1 radio at a time can be set to Client Bridge/Client Router mode. For example the 2.4GHz radio on the ENH700EXT is set to Client Bridge, Client Router, WDS-Bridge or WDS Station then the option to set the 5GHz radio to Client Bridge will not be available and vice versa.
Supported Operation Modes:
WDS Access Point
Operation Mode Combinations: