4-bay Value series  Realtek RTD1619B quad-core processor  ,2GB non-ECC DDR4 onboard (non-upgradable), 2 x 1GbE RJ-45 ports ,2 x USB 3.2 ports

Synology 4-Bay Desktop NAS , CPU : Intel Celeron J4025 Dual Core 2.0 GHz , Memory : 2 GB DDR4 (Up to 6GB) , Drive Bay : 4 , LAN Port : 2 x RJ-45 1GbE , USB Port : 2 x USB 3.0

4-bay Plus series model with Intel Celeron J4125 quad-core processor, 2 GB non-ECC DDR4 onboard, expandable up to 6 GB, Built-in 2 x 1GbE RJ-45 LAN ports and 2 x USB 3.2 ports , 2 x M.2 2280 NVMe slots

Synology 4-Bay Desktop NAS , CPU : AMD Ryzen R1600 2-core/4-Thread 2.6Ghz , Memory : 4 GB DDR4 (Up to 32GB) , Drive Bay : 4 (Up to 9) , M.2 Slot : 2 (NVMe) , LAN Port : 2 x RJ-45 1GbE , USB Port : 2 x USB 3.2 Gen 1 , eSATA Port : 1 , PCIe Expansion : 1 x Gen3 x2 network upgrade slot

Synology 5-Bay Desktop NAS , CPU : AMD Ryzen R1600 2-core 2.6 GHz , Memory : 8 GB DDR4 ECC , Drive Bay : 5 (Up to 15) , M.2 Slots : 2 (NVMe) , LAN Port : 4 x RJ-45 1GbE , USB Port : 2 x USB 3.2 Gen 1 , eSATA Port : 2 , eSATA Port : 1 x PCIe Gen3 x2

Synology 6-Bay Desktop NAS , CPU : AMD Ryzen V1500B 4-core 2.2 GHz , Memory : 4 GB DDR4 ECC (Up to 32GB) , Drive Bay : 6 (Up to 16) , M.2 Drive Slots : 2 (NVMe), LAN Port : 4 x 1GbE , USB Port : 3 x USB 3.0 , eSATA Port : 2 , PCIe Expansion : 1 x Gen3 x8 slot 

1-bay Plus series model with Realtek RTD1619B 1.7GHz quad-core processor,1 GB non-ECC DDR4 onboard (non-upgradable), Built-in 1 x 1GbE RJ-45 LAN ports and 2 x USB 3.2 Gen 1 ports. Support Btrfs file system

2-bay Plus series model with Intel Celeron J4125 quad-core processor, 2 GB non-ECC DDR4 onboard, expandable up to 6 GB, Built-in 2 x 1GbE RJ-45 LAN ports and 2 x USB 3.2 Gen 1 ports.

Buffalo LinkStation 500 , 2-Bay NAS , Diskless Enclosure (Not include HDD) , CPU : Realtek RTD1195N Dual Core processor , Memory : DDR3 256MB 

Buffalo TeraStation 3410RN , 1U Rack Mountable , 4-Bay NAS , Capacity 8.0TB (2TB x4) , CPU : Annapurna Labs AL212 (Dual Core) , RAM : DDR3 1GB

Buffalo TeraStation 5410DN , 4-Bay NAS , Capacity 8TB (2TBx4) , CPU : Annapurna Labs Quad Core processor , Memory : DDR3 ECC 4GB

Buffalo TeraStation 5410DN , 4-Bay NAS , Capacity 16TB (4TBx4) , CPU : Annapurna Labs Quad Core processor , Memory : DDR3 ECC 4GB