Best over the counter device

I purchased this because I have chronic neck issues. I have had seven surgeries on my neck. I have two different tens units in my home that are prescription. This looked interesting and so I gave it a try and I have recommended it now to everyone. This by far is the best over the counter and even prescription device I own. I am always trying different items and when I saw this I was very interested. I charge it overnight and get at least six hours of usage out of it. It has never died because of the battery yet at all. I like the heating element and I like the different patterns of vibration it can give. I can honestly say that I feel the doctors should have this in their offices for people to try. I do not get excited about much anymore when it comes to pain relief but this has been my best purchase for neck therapy I have made. I cannot recommend this enough.