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. Residential entrances. Business entrances. Service doors. 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. Part Number: DB40-WH (off-white) DB40-BN (dark brown). Environmental: -26C to 54C (-15F to 130F). Panel Size: 76mm x 121mm (3 x 4.75 ). Button Cap: White plastic. Contact Rating: 500mA at 24VAC.