The CD/DVD-ROM SLIM formats or reduced (about 1.5cm high) use a specific connector 50-pin where you transfer data, audio and power to the unit. This adapter separates these signals from the 50-pin connector and transports them to the connectors commonly found in desktop computers such as the IDE. In this adapter, connector is a 44-pin IDE Male for power and data (the typical connector laptop hard drives) and also adds two connectors for CD-Audio 4-pin analog. Essential for attaching CD/DVD SLIM formats to a desktop PC that has 44-pin hose (data + power).