Questions about Poly Explorer 55

Voilà: https://www.plantronics.com/de/de/support/knowledge-base/kb-article-page.html?type=How_To__kav&lang=de&urlName=M25-M55-How-to-Pair&t=All&k=M55

We have no information at the moment. As soon as the supplier can give us a date, we will update the page.

Yes, two phones work at the same time.

Bluetooth v3.0 with A2DP for music and audio streaming, Hands-Free (HFP) Profile 1.6 and Headset (HSP) Profile 1.1

I use it with Whatsapp, phone, works perfectly. I have never used it for dictation, but the voice can be heard very well when recording. I'm thrilled with the "button in the ear", I've never had a better one and it's comfortable to have in my ear for hours (car journey). I think it will also work well for speech recognition.

For me, yes, with a DELL XPS 15 9570/Windows 10.