That comes under the electronic heading of ... If all else fails, read the instructions. That said, I got a set of wireless earbuds for Christmas and it brought to my attention how sadly lacking in important detail some of the instructions are. They are written by nerds that understand all the terminology and leave out so much detail that you don't know if you are doing it right or not. For example, on the charging unit they say that when it is fully charged the LED light will come on. The problem is that there are four LED lights and at some point in time ALL OF THEM ARE ON. That's fine if it were to be specific about which one(s) I would have been so grateful, but they couldn't be bothered to write that into the instructions. So, it becomes guessing time. Yes, I know "first world problems" but this is the world that I happen to live in and I'm to old to have grown up with all the technology they had. My high tech was a small transistor radio. Give me a break.