Flickering blue light
"I have enjoyed buying and using the other frequency generators and this is my fourth one. This one has a quick flickering blue light (see attached video) right after opening the package. I'm not sure if this means it's defected or not. It's definitely headache inducing to look at that light so I hide it by putting it flat on the bed. I'm just not sure if it's proper or if I need to get a replacement."