DiskStation DS419slim

PU Marvell Armada 385 88F6820
Hardware encryption engine (AES-NI)
System Memory: 512 MB DDR3L  
Total Memory Slots: 2
Memory Expandable up to 6 GB (2 GB + 4 GB)
Storage Drive Bays : 4 
Maximum Drive Bays with Expansion Unit: 9
Hot swappable drive
External ports USB 3.0 ports x 2; RJ-45 1GbE LAN Port x 2
Size (HxWxD) 120 mm x 105 mm x 142 mm