After the device is on, tap the Power on-off/Speed switch button ⑤, speed will be shifted up and the next speed light is on. Keep tapping the button ⑤ until your desired speed light is on. The speed setting is done. Note: The higher the speed, the higher the intensity of the massage. Below is the general guideline for your reference. (1) Speed 1 – 2000 rpm: for warming up muscles or very sore muscles. (2) Speed 2 – 2500 rpm: for soothing tired muscles or sore muscles. (3) Speed 3 – 3000 rpm: for relaxing stiff muscles. (4) Speed 4 – 3200 rpm: for massaging very stiff muscles or deep tight knots.