I am looking for a pair of ANC headphones that I can use not connected to my phone or any device (besides setup). All I want to be able to do is hit a switch and turn on the ANC without playing music or anything else. Any suggestions? Any budget is fine, but I am a stickler for build quality...

This is by far my most used speaker/headphone. It gets used at least 4-8 hours every day. It makes watching YouTube or listening to podcasts so much better than straight from my phone, without having to worry about carrying around headphones everywhere. It even works great with phone calls...