A device that enables users to access their intercom remotely. 
 

I have a standard phone intercom with a buzzer to open the building entrance. If this could be connected to the Tapo app and answered without having to physically go to the intercom it would be very useful. 
 

Ring have this device already - search Ring intercom - which upgrades your existing intercom to a smart system with Remote Unlock, Two-Way Talk, Guest Access. 
 

The Ring model is pricey but very useful, particularly for apartments, accepting deliveries when away from home, letting guests into the building, getting into the building without needing your key, ease/accessibility for those unwell or less able, integration with home hubs, smart commands/actions. 

I'd rather stick to one eco system since I have Tapo products already, but would switch for this.