A:AnswerI wouldn't say they block light completely. For me there is a little light that comes in around the bridge of my nose. Since you are directed to use them with your eyes closed they do a great job. You totally forget about the light after a moment, and jusr relax into them.
A:AnswerIt depends on how you sleep. If on your back and you don't move around much, it could be a great sleep aid. I have used it with my cpap and although very nice, i couldn't sleep in it all night.
A:AnswerThey don't stream at all. But once you connect the headset to your phone via Bluetooth and they sync, while you are enjoying the heat and or massage of the headset - the soft music or relaxing sounds play through your phone or earbuds, and they turn off together.
