The Flashing Blue Light is Normal
"I have three Energy Muse generators and I love them all and even take them with me when I travel. My 7. 83 was the last one I purchased so I thought it was broken and contacted their customer service and they assured me that the flashing light was because of the difference in frequency, so it’s normal. I recharged my 7. 83 after it had been powered down for a few weeks and the last two days, I’ve sleep like a baby. I can tell the difference for sure. Also, the 417Hz is amazing My sons with ADHD stopped arguing with each other when it’s powered up. I can always tell when the battery is out again because these two start up. These generators work. The 963 is great for when I’m meditating or doing readings. The hardest thing is remembering to keep them charged."