I have Digitech 2.4Ghz wireless headphones.

Every time I use the microwave, the phones are interfered with.

I also get a problem with wireless. When I use either Chrome cast or the T2100 Freeview plus box, they both interfere with the phones and vice versa. Either I get interference on the phones or the wireless drops or cannot find the connection to the internet.

There are also wireless HDMI sender/receivers that I might consider but they are also on the 2.4GHz bandwidth and I suspect those too will cause problems.

What are solutions to get round the 2.4GHz bandwidth conflicts?

I heard some time ago there were 5.8GHz wireless headphones but I can't currently find any.

The ones I own have another problem of their own. Someone who designed thought it would be "clever" idea to save on battery (even though they are rechargeable) by automatically switching off when the sound is too low. Unfortunately it is not an option - you can't switch this "enhancement" off. I use it for listening to the TV and for music. Whenever there is a quieter part to the show I'm watching - maybe they're whispering - the sound switches off. And don't even use them for classical music - forget it, too many quiet moments. I could try turning the input sound up higher but them the sound distorts. I probably need better wireless phones.