A UHF Female to UHF Female Adapter is a specific type of connector used in radio and communication applications. This adapter has a UHF (Ultra High Frequency) female connector on both ends, allowing two cables with UHF male connectors to be joined together.
The SO-239 (SO239) is a specific design of UHF female connector that is widely used in amateur radio and other communication applications. It's designed to mate with a PL-259 (PL259), which is the corresponding male UHF connector.