When you use GBA Movie Player and the CF card to work with the your GBA,you need this CompactFlash Card Reader/Writer,details as bellow: Full speed USB V1.1 or V2.0 connectivity Read and write flash memory card Truly plug-and-play, hot swappable Perfect for mobile user A convenient and fast data exchange device for Mp3, PDA, Digital Camera, etc USB interface USB bus-powered, no external power supply is needed Power LED indicator