40Hz Light and Sound Therapy Device for Gamma Frequency Brainwave Entrainment, Pocket Size Battery Powered, for Wellness Use

Seems to work fine as advertised.

I am ordering my second unit. The best feature of this device is that you can do sound and light together. I have used other products but the light on most devices bothers my eyes. The ear buds are too loud but, I tuck them under old head phones to hold them in place, you are able to hear them without having your eardrums blown out. My husband has used this therapy for less than a month and had an unexpected blessing; the Bells Palsy that he had for over 50 years has vanished.

This would be great if a speaker could be plugged in instead of the ear buds

It’s simple to use. The 40Hz entrainment seems to benefit feeling better and focus. I don’t like the headphones as they distort at higher volumes. Should have been a bluetooth connection instead.

I love this device..easy to use and small enough to take in purse or pocket..only had it a few days but notice a difference in my memory already..my brain feels clean..only way I can describe it..I was told I have mild white matter disease and this device will help it..stop it and hopefully reverse it..worth the hour investment each day..can be slit up 30-30 or 20-20-20 I wish I could have found it on Amazon as I got it on eBay and paid $149 instead of the $99 here.