Questions about Pyrexx Smoke detector PX-1C radio

Can you also supply this model in black?

Am I right in assuming that this smoke detector is already equipped with a wireless module, as the name suggests ("wireless")? Does this mean that an additional module does not need to be purchased to network several smoke detectors?

I put this product in my basket yesterday and I was surprised this morning when the price increased so much, from 64 chf to 103 chf. I hope the price gets corrected soon cause this product is not worth 103 chf, even the historic maximum of digitec is 75 chf.

Does this smoke detector have a group alarm? With or without a gateway. As soon as one detector goes off, they should all sound an alarm.

How long does the built-in battery last? After that, it seems that you have to buy a completely new detector or is it rechargeable?

Good day. I would like to order 4 pieces of this product. According to your homepage, the price is 54 francs per item, which is how it appears in my shopping basket. But on the final invoice, it is suddenly 67.30 Fr. per product. How is this possible? What do I have to do to get the cheaper price? I can send you print screens of the shopping basket and the final invoice. (I also put another non-radio smoke detector in the shopping basket, but that shouldn't be a problem). Kind regards Nicole Devereux

Good day. I have a question about this smoke detector: We would like to install this in the kitchen and we want one that does not react to smoke but only to smoke in combination with heat. Does this product meet this criterion? (I wanted to ask the company directly, but they do not allow private customers to make such requests). We would like four of these smoke detectors. Kind regards and best thanks in advance, Nicole Devereux