• Under standby mode, tapping "Call" on the Outdoor Unit triggers continuous ringing on all indoor units and lights up the screens for visitor imaging.
• Calls automatically hang up after 60 seconds if there is no answer.
• Once "Answer" is tapped, the ring stops and a two-way intercom (up to 120s) begins. Tapping "Home" can end the intercom manually.

• In standby mode, tap "Monitor" to see outdoor images (one-way audio initially).
• Tap "Answer" during monitoring to enable two-way intercom.
• Monitoring stops automatically after 90 seconds or by tapping "Hang up".

• Unlock doors or gates directly during intercom mode with adjustable unlocking time.
• Supports unlocking current of 500mA or below.
• Remote opening available via the "Monitor" then "Answer" then "Unlock" sequence.

Support for intercom among indoor units. Tapping "Talk" rings all indoor units; once answered, a private internal conversation starts and stops automatically after 90 seconds.