<p>Square electrical box adapter plate for SurroundVideo® series, MegaDome® series, MegaView® series, and MegaVideo® series in HSG2 or D4SO housings. Also compatible with MicroDome® series surface mounted cameras  (-S models) and MegaBall® series dome cameras via their respective compatible wall mounts. Compatible mounts include AV-WMJB, AV-PMJB, AV-SWMJB, MCD-WMT, HSG2-WMT, and AV-JBA. Works with 4S box, 4″ square box, single gang box, and double gang box</p>
<p><img class="alignnone  wp-image-80295" src="https://securitybestbuy.com/wp-content/uploads/2016/10/AV-EBAS-2-1-300x203.jpg" alt="" width="383" height="259" /></p>