It works. The storage box is nice. I'm glad I screenshoted the diagram showing pad placements from the website because the instruction sheet is woefully inadequate and was clearly written by a non-English speaker. The item works on 3 AAA batteries. So, I do not understand why there are rechargeable plug and cord included. There are no explanations on the instruction sheet for this either. It can't have a rechargeable battery. I expected it to have the weight of a cell phone or power bank based on comparable size, but it weighs next to nothing.