ENTRYWAY EAGLE DOOR INTERCOM/VIEWING SYSTEM See, hear and speak with the person at the door without opening it. A very effective safety device priced much less than other door intercoms and security devices. Easy to use 2 way Intercom, door chime, 1 way viewer and listening device manufactured with impact resistant plastic containing UV inhibitors for years of use Installs in minutes, replacing your current peephole viewer, and no tools required Volume is adjustable. Ideal for the hearing impaired. You can see and listen to outside activity without them knowing