7.83HZ Schumann Wave Ultra-Low Frequency Pulse Generator & Audio Resonator, DC

However, when I first started using them, I swear I noticed an improvement. New tweak bias perhaps? That's possible. My thoughts:

When first used one last year:
"I swear I hear a difference. A little more depth?
Tried on a bunch of different music.
Hard to pinpoint what the difference is."
A month later
"More authority to the music; a tighter grip. A little more depth as well."
Did notice more authority when I first used them. Has now blended in as the norm. I initially felt a little spaced out.

Have had one of the cheap 5v ones from Alliexpress under the bed for six weeks. Tried it last year, but couldn’t sleep.

This time round I persevered, and it is easier. Waking up less, but no real idea if it has an effect. I have noticed that I am not tired during the day, no matter how many hours I've slept.

One thing I did notice was the two I had in my classroom.
One from Ebay, one from Alliexpress.

I have a pretty tough bunch, some with major social and emotional needs. 

My class was a calm class. I'm putting some weight on the Schumann Resonators. Enough to buy a third one for the start of the year.

The class on Schumann resonators was last week, fellas.

I have read where these new age contraptions supposedly help everything from sleep to your love life and cause everything from anxiety to cancer so take your pick.