I purchased the Hempvana Rocket Tens Therapy pain relief pen on 08/09/2021 and received it a few days ago via USPS. I immediately opened the PCH package and removed the content. I read and followed the instructions the instructions inside the box. I then put a brand new AA battery into the tens unit as instructed. Upon turning on the unit, I began receiving electrical shocks through my hand. The higher the level I went, the more intense the shocks were. And when I tried to apply the tip ( it didn't matter which one of three heads provided) to the area of my skin, there was a "stinging" electrical shock. Since then, I have been unable to use the item. I even tried to put on a glove which stopped the electrical shocks in my hand, but not the stinging sensation on my skin. So now, what is my recourse of getting a refund for this item.