The Innotest is a module style tester. It consists of a main unit, to which you would insert multiple different modules that add different connector types. This unit supports 32 different connectors and automatically detects them when connected. This specific unit comes with several commonly used SATA modules. Included Modules: SATA, eSATA, e-SATAp (Power eSATA) ***Required for power: 2 AA Batteries (not included with tester).