QNAP TS-220 2-Bay TurboNAS Network Storage

QNAP TS-220 2-Bay TurboNAS, SATA 3GB, Marvell 6282 1.6G, 512M DDRII RAM, 1x GbE LAN.

QNAP TS-451+-2G 4Bay NAS Network Storage

QNAP TS-451+-2G 4Bay NAS Intel Celeron QuadCore
2.0GHz (up to 2.42GHz) 2GB DDR3L RAM (max 8GB), SATA 6Gb/s 2 x GbE.

QNAP TS-451-4G, 4 Bay Hotswap NAS Network Storage

QNAP TS-451-4G, 4 Bay Hotswap NAS Intel Celeron 2.41Ghz Dual Core, 2x2Gb (up to 8Gb), 2 x 1Gbe, iSCSI.

QNAP TS-451S, 4 Bay 2.5" (SSD or SATA) Hotswap NAS Network Storage

QNAP TS-451S, 4 Bay 2.5" (SSD or SATA) Hotswap NAS, Intel Celeron 2.41GHz Quad Core, 1Gb DDRIII (up to 8Gb), iSCSI, 2 Giga LAN.

QNAP TS653A-4G, 6Bay NAS Network Storage

QNAP TS653A-4G, 6Bay NAS, Intel Celeron Braswell N3150 Quad Core 1.6GHz (up to 2.08GHz), 4GB DDR3L SODIMM RAM (max8GB), SATA 6Gb/s.