Usage suggestions: 1. Duration of each use: It is recommended to use 10-20 minutes each time, depending on your tolerance. 2. Frequency of use: It is recommended to use 3-5 times a week for 8-12 weeks to achieve a noticeable firming effect. 3. Maintenance phase: After achieving the desired effect, it can be reduced to 1-2 times a week to maintain the effect. 4. Pause and restart: After 8-12 weeks of continuous use, you can pause for 2-4 weeks to let the skin rest and then restart a new round of care. Precautions: 1. Use with the introduction gel to enhance the effect and prevent skin burning. 2. Avoid using on inflamed, damaged or allergic skin areas. 3. If the skin feels uncomfortable, you can reduce the time or frequency of use.