Door Bell Button Panel in White fits any standard single gang box. Made from unbreakable plastic. The Viking DB40 Door Bell Button Panels permit the user to install a simple door bell button today and allow for an easy upgrade to a Viking E-40 Door Phone. By replacing the traditional door bell button with a single gang box and a Viking Button Panel, the front entrance of any home can be set up to handle the requirements of two-way audio later. Applications Residential entrances Business entrances Service doors Features Fits any standard single gang box Offered in two colors, off-white and dark brown Panels are made from unbreakable plastic Weather resistant gasket included Screw terminals on button for easy wiring Use with the Viking VE-3x5 enclosure for surface mounting Promotional card for future sales.