Features:

Storage capacity expansion
When the storage capacity on Synology 1U RackStation reaches its limit, Synology expansion unit RX418 provides easy capacity expansion by adding 4 3.5"/2.5" SATA drives to the system. Synology RX418 can also be used as a dedicated local backup destination of Synology 1U RackStation for comprehensive data protection.

Reliable plug-and-play design
Simply connect Synology RX418 to corresponding Synology RackStation and it is ready to use. Drives in the connected Synology RX418 operate as though they were internal to the connected Synology NAS and can be managed directly by Synology DiskStation Manager (DSM), with no additional software installation required.

Green and easy to manage
Award-winning Synology DSM provides an intuitive user interface for easy system management. Drive hibernation can be configured in DSM to take effect automatically when the system has been inactive for a period of time. This not only saves energy but also extends the lifespan of the installed drives.

Specifications:

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Specifications
Product Code	Synology RX418
Hardware Specifications
Applied Models	RS818(RP)+
	RS815(RP)+
	RS816
	RS815
	Some models support independent volumes creation only. Please
Note	DSM version requirement: 6.1.4-15217-3 or later version
Storage
Drive Bays	4
Compatible Drive Type	3.5" SATA HDD
	2.5" SATA HDD
	2.5" SATA SSD
Maximum Internal Raw Capacity	48 TB (12 TB drive x 4) (Capacity may vary by RAID types)
Hot Swappable Drive	Yes
RAID Management through Synology DSM	Yes
External Ports
eSATA port	1
Appearance
Size (Height x Width x Depth)	44 mm x 480 mm x 325 mm
Weight	4.28 kg
Power
Power Recovery	Synchronized with the Synology RackStation
Power Supply Unit / Adapter	100W
AC Input Power Voltage	100V to 240V AC
Power Frequency	50/60 Hz, Single Phase
Power Consumption	23.26 W (Access)
	6.39 W (HDD Hibernation)
British Thermal Unit	79.42 BTU/hr (Access)
	21.82 BTU/hr (HDD Hibernation)
Note	Power consumption is measured when fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
Temperature
Operating Temperature	5°C to 35°C (40°F to 95°F)
Storage Temperature	-20°C to 60°C (-5°F to 140°F)
Relative Humidity	5% to 95% RH
Others
System Fan	40 mm x 40 mm x 3 pcs
Noise Level	25.1 dB(A)
Note	Noise Level Testing Environment: Fully loaded with Seagate 1TB ST31000520AS hard drive(s) in idle; Two G.R.A.S. Type 40AE microphones, each set up at 1 meter away from the Synology NAS front and rear; Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75°C; Humidity: 58.2-61.8%
Certification	FCC
	CE
	BSMI
	EAC
	VCCI
	RCM
	KC
Environment & Packaging
Environment	RoHS Compliant
Packaging Content	Main Unit X 1
	User's Guide X 1
	Accessory Pack X 1
	AC Power Cord X 1
	Expansion Cable: eSATA X 1
Optional Accessories	Synology RKS1317 - Rail Kit Sliding
	Synology RKM114 - Rail Kit Mounted