Here's a bit of what Amazon says about their FLYMEI® USB Rechargeable LED Light Up Shutter Shaded Glasses Our sound control LED glasses will make you become the focus one on the stage or in the pub or wherever. Everyone will be able to see the music in your eyes as these glasses light up to the beat of the music! It can make you become the coolest person. The glasses are safe and convenient to use which is very popular among young people. LED musical shades automatically adjust the audio sensor according to the volume of the surrounding.
The Giz Wiz adds, I do like these a lot! Great fun, no wires or battery packs to hide; everything is built into the glasses. USB charging cable included. Be sure to watch the video to see how they look when responding to every sound, voice or music. Even though the description says automatically adjusts volume, there is a "Loud" or "Normal Environment" switch on the glasses. I think they're great for under $14.00.
Giz Wiz Video: https://youtu.be/fJXgm9MVGLo
Amazon Link: http://amzn.to/2hp9ftU
(Giz Wiz Link: You pay exactly the same as everyone else, Giz Wiz Biz gets a small credit to buy more stuff to demo! Thank you!)
See or hear this show: www.gizwiz.tv/episode/1601 (Goes live late Friday 12/16/16)