HDL-XR4W/TM3 - Model: XR Series - Number of Bays: 4-bay - Capacity: HDD case only, HDDs not included - Included Accessories: Power cable - Condition: Used - Power on and web connection confirmed Note 1: One rubber bushing on the bottom of the unit is missing (see photo 3). There are no issues with use. Note 2: Key is not included. Will be shipped in the unlocked state. File Sharing Services: Windows File Service, Macintosh File Service, FTP File Service Supported Protocols: Windows: TCP/IP, Macintosh: AppleTalk, TCP/IP Recommended Maximum Simultaneous Connections: Windows: 32, Mac OS: 8 LAN Port: 1000BASE-T/100BASE-TX/10BASE-T, Auto-MDI/MDIX USB Ports: USB 2.0/1.1 SATA Port: External Serial ATA, eSATA x 1 (rear) HDD: Cartridge type, 4 internal (SATA connection) Expansion Devices: USB x 2, eSATA x 1 RAID: Method (Software) Levels: RAID 0 (Striping), RAID 5 (Distributed Parity), RAID 6 (Dual Distributed Parity) RAID 5+S (Distributed Parity + Hot Spare), RAID 1m+S (Mirroring + Hot Spare) Thank you for viewing.