The Iomega External SCSI 100MB Zip Drive Z100S2 stores up to 100MB of data on Iomega Zip disks. It works with Mac computers and SCSI enabled PC"s. It is a small, portable drive that weighs about a pound that fits easily in a bag or briefcase. Reads and writes to 100MB Zip Disks only. Package contents include: 100MB SCSI Iomega Zip Drive, power supply, cable, one 100MB Zip Disk, CD-ROM containing IomegaWare software and owners manual.