SKGP7 comes with function keys. After putting on the massager, the power button is on our left. Press and hold in the middle 1.5 seconds to open. Short press after starting the machine is to switch the massage mode. There are four massage methods: kneading and pressing, shiatsu rolling, stirring and awakening, and comprehensive kneading. The kneading technique and intensity of each mode are different, so you can try them one by one. The addition and subtraction of force are "+"and "-"on both sides of the circle, and there are ***3 gears. If you work for a long time and your neck hurts, you can slowly change from low-grade to high-grade to gradually relieve the pain. If you want to have a massage when you are resting or playing games, the second gear is actually ok. Of course, everyone feels differently about the intensity of massage. Just follow your heart.