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. Note: MegaDome 4K, SurroundVideo G5 Mini, and MicroDome Duo have a built-in electrical box adapter plate and therefore do not require an additional electrical box adapter plate such as AV-EBAS.