Does the Tsukino house have a doorbell?

[Crescent Pulsar S]

Anything relating to the arrival of guests is rather sparse in the manga, and I don't want to dig through it to find them. I recall one such occasion, but they were standing outside, which suggests that people might not just step into the house and announce themselves from the genkan. I don't remember enough of the anime for that sort of scene to be prominent in my memory, so I have no idea if people knocked, rang a doorbell, or announced themselves from the genkan.

Does anyone happen to know which it is?

[Spica75]

I wont say that i´m certain, but IIRC in the anime there´s a regular/common style electric doorbell.
I´m fairly sure people never just stepped in.

[PCHeintz72]

Considering it has a front gate just to get on the property, I would think it would *have* to have some form of indicator someone is outside...