AN/PRC-64 (later: RS-69) was a milnature paramilitary spy radio set, developed in the early 1960s by Delco in the USA, as a possible successor to the RS-1 (AN/GRC-109). It was intended for agente communication and for paramilitary use by Special Forces (SF). The (black) CIA version is also known as Delco 5300. The set is known to have been used by the Special Operations Group of the Australian Army in Vietnam, and its featured in Keith Melton's book Ultimate Spy, not tested