Questions about Inkbird IBT-4XS BBQ (incl. 4 probes)

Yes, why not, it has clips for the grill to mount them on the grate.

I just tested it for you. It stops at 0 degrees, so no temperatures in the minus range. (Works without stupid counter-questions)

No, it wouldn't work, you need a wireless one, e.g. Meater Smarter Meat Thermometer, but it's more expensive.

as long as the app is running and remains connected to the IBT-4XS, yes. - and only then. Unfortunately without a memory option.

That's exactly how it is with me, I bought it a few weeks ago. I assume the one without the tip is optimised for measuring in the cooking chamber. Goodbye.

Yes, you can. But you only see the temperature. Alarms, etc. have to be configured with the mobile device.