-SCSI-1 box that connects to the zorro expansion port on A500. -Max Transfer 2.1MB/sec -SCSI Chip: VLSI -Max Ram: 8MB -Ram Type: 8 x 30pin SIMM slots. -Includes external power supply. -Usually supplied with quantum SCSI hard drive. -Game switch which disables hard drive. -External 25pin SCSI Connector. -Internal expansion slot for use with things like bridgeboard.