As far as I know no, the H800 has its own USB dongle and it is without the Unifying logo. However, if you have a notebook with Windows 10, you can connect it directly via the control panel / devices with Bluetooth and the recognition is great. The headset is also automatically reconnected after every restart. If you move too far away and come back again, you may have to click on "Connect" again in the control panel / Devices.

They work fine with any Windows / Mac OS communication app (Teams, Skype, Discord, Zoom, WhatsApp etc.). There is no special Teams-button, only Mute that works universally. Audio/Mic quality is excellent for calls with Wireless (USB dongle) connection, mediocre over BlueTooth. Battery life is around 7 hours of music / calls so I switch them off between calls and they last a few days. For me these are the most comfortable (very lightweight) on-ear headphones I've had so far and I use them every day (for calls).

No, unfortunately not. There is nothing exactly the same on the Logitech homepage (manufacturer).

the headset works via bluetooth or via the included usb-stick. for this purpose, the hedset has a selector switch on the right side for the respective operating mode. therefore, i believe that swisscom has offered a wrong product. as i see it, only a headset with jack plug works with the hd phone davos anyway.

Yes, it is adjustable.

Hello Holgzh I use the headset with Skype for business and MS Teams. The button works perfectly with both. The problem is sometimes when putting on the headset that the button is pressed by mistake. In addition, the device must be recognised by the system and set accordingly in the software.

I don't know about Digitec, Logitech itself sells receivers individually on its webshop. As a replacement ok. I tried to use this with 2 receivers on 2 devices (one at home, one at work). I couldn't manage to stay paired with both at the same time, I always had to reconnect (strangely enough via bluetooth multiple go ... but reception worse)

short and simple.... no

I'm sorry, I can't say. I haven't tried this type yet. I'm testing with Linux. Almost everything works with it.

Ja problemlos

Hello Roberto Unfortunately we cannot offer this battery. Logitech spare parts must always be obtained directly from Logitech Support. http://support.logitech.com/de_ch/parts

Yes, but that would only be possible via Bluetooth. In this case, I would check other (cheaper) alternatives, as battery life is limited.