DP870C User Manual Attached is the user manual for the DP870C Door Intercom. MANUAL Related articles SWIFI-BUDDY - SwannBuddy™ Video Doorbell DP880C User Manual En SWIFI-4KBUDDY - SwannBuddy4K™ Video Doorbell How to Connect an AC Power Supply to Your Swann Security Doorbell HOM-DC820P - Wireless Door Chime with Receiver