Intel® Atom D2550 1.86GHz Dual Core CPU
2GB DDR3 RAM
4-Bay, RAID 0 / 1 / 5 / 10 & HDD hotswap support
2 x USB 3.0, 2 x USB 2.0, 1 x D-Sub 9-pin, 2 x Gigabit Ethernet
WebAccess for Business for iOS & Android
IP Camera support (1 license included)
TrendMicro NAS Security (optional license)
Built-in Web, FTP, DLNA, iTunes & Print server
iSCSI target, Amazon S3, Time Machine, BT, AD, NFS support
Data Replication & Failover support
AES-128 bit hard drive encryption
NovaBackup Business Essential (10 licenses included)
3 years local warranty

Official Website: http://hk.buffalo-asia.com/forbusiness/business_nas/ts5000/ts5400d-ap/