Best Airbus Headsets

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Hi guys!

I would like to buy an Airbus Compatible headset, and the only one I found with the airbus jack included in the wire itself was the SennHeiser HMEC25 CAP.

Now I see they come with batteries and I didn't understand very well if they are self powered or if they work with any other power supply.

To make the ANR work, does the ACP need to be in INT? We only use it like this up to FL100.

Last but not least, is there any better headset?

Thanks!