Hello, Yes, you can put a micro SD in it. You can watch the video from the Tapo application like all the other cameras.

To function, this doorbell system requires both the doorbell unit and the accompanying hub (H200) as a kit; the hub must be set up first before the doorbell. A smartphone alone is not enough, as the hub connects the doorbell to your network and app. You do not need to purchase a subscription to use the system's features. The setup involves configuring the hub via the Tapo app, then connecting the doorbell to the hub, with both devices on the same 2.4GHz Wi-Fi network. The doorbell is powered by a rechargeable battery and controlled through the app on your smartphone without additional stations or subscriptions.

Yes it is. It has a rubber band inside the battery compartment. But I am not sure, if the bell-button works when frozen.

The battery life of the doorbell is approximately 180 days on one charge, depending on usage. For example, if the doorbell is activated 10 times a day for 30 seconds per clip, the battery can last up to 6 months.

Yes if I am not mistaken they sell it separately then it will have to be connected to the existing one

You do not need a second hub for the Tapo D230S1 doorbell if you have already set up a hub H200. A single H200 hub can support up to 4 Tapo D230S1 doorbells as well as other devices such as window sensors, water sensors and humidity sensors. It is therefore possible to keep the existing configuration with the Hub H200 and add the D230S1 doorbell without the need for an additional hub.

The Tapo D230S1 Smart Battery Video Doorbell must be used with the Tapo Hub H200 supplied, as it does not work with other Tapo brand hubs or third-party hubs. - The Tapo D230S1 can only be paired with one H200 Hub at a time. - It is not possible to connect it to any other Tapo Smart Hub other than the H200. However, you can use the wireless connection (Wi-Fi) to configure and use the Tapo D230S1, provided that your router is configured to use the 2.4 GHz network.

Yes, no problem for us! We're at 1500m...

Shelly? I don't know it. Tapo Doorbell communicates exclusively with the Tapo Hub, all wireless. The hub is connected to wifi or lan and can be operated via app (Apple or Android).

I don't understand it either. I also asked the question here: TP-Link D230S1 (WLAN) I can't say why the products have not been revised. In any case, I bought this one for CHF 83.