The Extension Unit for WJ-ND400 NVR Series (9 TB) from Panasonic allows you to increase the storage capacity of the WJ-ND400 NVRs.
Panasonic Extension Unit for WJ-ND400 NVR Series (9 TB)
3.3' (1 m) Connection Cable
Rack Mounting Bracket
Rack Mounting Bracket Fixing Screw
Screw for Rack Handle
HDD Mounting Screw