That's exactly what I use the product for and it works without any problems👌.

I don't think so. My iPhone headsets all have a quadruple 3.5 inch connector for miko and stereo speakers. The DelockPort is only triple wired and switched as far as I know. I assume it will not work with a quad connector.

No, that's not possible. It can be changed at the touch of a button, but nothing can be changed.

The product mentioned is offered by various third-party retailers via our platform, over whose prices we have no influence. Therefore, there may be price differences between our prices and those of other suppliers. We currently have no delivery date and therefore no serious offer from ourselves.

Yes, it is a mechanical changeover switch, without power supply.

How many rings does the headset plug have? 2 or 3? 2 would work 3 would not

How many is "several"? You might already need a mixing console. Behringer has a good price-performance ratio here.

Depends on the headset. But since a headset usually has a usb or 4pin jack and the box only has a 3pin jack, it probably won't work. Or it will work as a headset, the microphone will not be usable.

I could not really detect any negative influence. The music is flawless with the loudspeaker or the headphones.

According to the manufacturer's website, no cables are included in the scope of delivery. Further information: https://www.delock.de/produkte/G_87699/merkmale.html PS: In my opinion, it does not make sense to include cables with such products, as different lengths are required depending on the intended use and placement.