There must be advertisements in it, but this machine has the highest requirements for operators among all massagers. When purchasing the machine, very detailed instructions and operation tutorials are provided. Some people want to use this instrument to open a shop for others to do physical therapy to make money, but they have to go to the place where they buy the machine to get a license. If they have no license, they are not allowed to make a profit. You can call the seller at 03 17-5320800.