I tested it and I got impressed with the quality of the product. Used about one hour directly and after that the remaining battery of the earplugs were around 85%. About the comfort is something else I would like to give a good point, it does not hurt anything after long usage, very comfortable One thing that I see that needed to be done is to put a mark of Left and Right at the plugs because as you have specific commands for each side, you don't really know which one you are using at the moment unless you try to send a command to it.

doesn’t work