The Commodore Amiga 520 A520 RF Video Modulator External Display Adapter is an AV adapter/converter unit designed for use with the Commodore Amiga 520 model. It features a connector for connection to the computer and RCA female connectors for output to a TV or monitor. This external display adapter allows users to view their computer's display on a TV or monitor, making it a convenient accessory for those looking to connect their Amiga to a larger screen.