The product page of Function Extension Kits "WV-Q169" from the Panasonic Security System. You can download features, manuals and firmware, specification sheet and more for WV-Q169 here.
WV-Q169 Key Feature - Panasonic security system - Products
The WV-Q169 is a ceiling embedded bracket that is exclusively designed to mount the color CCTV camera: WV-CW504F, WV-CW504S, and Network camera: WV-NW484S, WV-NW502S,
on a ceiling. This bracket can be used for an area with weak pull-out strength such as plasterboard in a double ceiling, and the embedded type makes the visible part of the camera smaller.