Turn on the switch behind the pen, and then I don't know if we bought the same pen. There is a small thing under the switch behind the pen. You click on it, and there is a plus sign on it. There is a plus sign and a minus sign below. Then click the plus sign to increase the volume of the stylus, and then turn down the volume of the minus sign stylus. Just like our previous remote control, it's actually very simple, as long as you observe it carefully. I think it's funny.