A:AnswerFollowing. The specs lists Alexa and that is why i bought them and they were delivered a few hours ago. Updated the firmware and control software yet Amazon Alexa app does not find them when I attempt to connect. I love the sound, but bought this model because of Alexa and alas no luck yet. Might be returning.
A:AnswerIf your TV is capable with Bluetooth there should be a setting in you menu option in your TV. If not is not Bluetooth capable. Hope this is helpful.
A:AnswerThey're not water resistant if that's what you're asking. I Wouldn't recommend heavy sweating in them, and they may fall off during heavy physical activity
A:AnswerI'm an amateur DJ myself, but I love how you can use them wired at any time, and they sound fantastic. Even without the noise cancelling feature on, they mute a lot of outside noise
A:AnswerFor specifically these headphones, the noise cancelling isn't strong enough to completely drain out that outside noise. That would require really top end headphones such as the Sony WH line, Bose, and Airpods Max.