The E-40 Series entry phones are compact, weather and vandal resistant, telephone line powered speaker phones designed to provide two-way hands-Free communication. The E-40s compact size allows it to be mounted in a standard single gang electrical box. The E-40 is available in five different attractive finishes to match your door hardware, light fixtures, etc. Also known as -Viking Electronics E-50-SS-EWP Video Entry Phone-Stainless St-Viking E-40ss-ewp Compact Entry Phone- Ewp-Viking Intercoms Automatic Entry Phone with Weather Protection VK-E-40-SS-EWP-Viking Electronics E-40-SS-EWP Single Gang Entry Phone with Enhanced Weather Pro