PANASONIC Model S. No. Description WV-PB4164 S00000 4 CH Camera Control Board   suitable for the WJ-RT416 DVR Allows PTZ camera control for 4 cameras
Model S. No. Description WJ-HDE300/G S77005 Expansion Unit for the WJ-ND300A   suitable for WJ-ND300A (4 HDD slots for optional HDD units)