There are 2 products.
The Synology 2 bay NAS DiskStation DS218j is the perfect entry level NAS device to make your own private cloud. The DiskStation DS218j offers large storage capacity for storing your data. It’s the perfect device to store movies, photos, games, or other forms of media data.
The Synology 2 bay NAS DiskStation DS218+ is a step above entry level, featuring a powerful dual-core CPU which is perfect for intensive personal home use or for small businesses who need a compact but reliable shared storage solution. With the DiskStation, you can save space on your computer and share files across a network using a Btrfs file system. Synology also provides built-in data protection and backups which protect accidental data loss.