Synology DiskStation DS620Slim 6-Bay 2.5" Diskless 2xGbE NAS, Intel Celeron, 2 GB DDR3L RAM, 2xUSB 3.0 - 2.5" DRIVES ONLY!
Synology DiskStation DS1520+ 5-Bay 3.5" Diskless 4xGbE NAS (Tower),Intel Celeron J4125 4-core 2.0GHz,8GB RAM,2xUSB3,2x eSATA,3Yrs Wty. NO RAM Upgrade
Synology DiskStation DS720+ 2-Bay 3.5" Diskless 2xGbE NAS (Scalable) ,Intel Celeron 2.0GHz 4-core, 2GB RAM, 2xUSB3, eSATA
Synology DiskStation DS920+ 4-Bay 3.5" Diskless, Intel Celeron J4125 4-core, 2xGbE NAS (SMB) - 4GB RAM, 2 x USB3, 1 x eSATA. 3 Yr Wty.