QS-WIFI-SEC02: 2 Gang, no gateways needed. QS--SEC02:2 Gang, needs to be used with gateways. QS--SEC02: 2 Gang, needs to be used with gateways. QS-WIFI-SEC01: 1 Gang. Switch Module (optional) Premium Material: This product is made from PC material, compact size design for quick and easy installation, it can be installed in the junction box and will not occupy to much space.
eBay