Had to figure this out
I've asked the company to re-write their instructions from "Hold long" to "Hold the power button for 2-3 secs" to turn on the red light pad. After I cleared this up with the company, this worked! Saved me from returning/refunding. I've only used it a few times and will continue for a few weeks to see if it will help with neck pain. Update...so far it's a week and I'm still hopeful that it will make a difference on the neck pain. The 4 stars is that this product actually turns on, but not in relieving the pain yet.
Rating: 4 stars