How does nello one work?

I live in anapartment building. Is nello the right solution for me?

Do I have to consult my landlord about the installation of nello one?

Can I always leave my key at home from now on?

How many doors can I control with nello one?

How secure is nello one?

What happens in case of a power failure with nello one?

Can I take nello one with me when I move?

Can I also talk to people at the door?

What does the flashing signal of the LED on the nello one mean?

Can I turn off the LED on the nello one?

How big and heavy is nello one?

Where is nello one produced?

How does the power supply work for nello one?