The instructions are very lacking. It is best to look up how to use it on YouTube or do a Google search for a better idea of how to use it. It's a decent little machine but it is a little low on power; you will have to use it religiously and properly to get results. You need to be using some sort of gel or lotion to get the ultrasonic waves to conduct through the skin. The infrared function works but, again, it is a little low on power. It does what it says it will do but it takes some time to get results and it has to be used properly.