Description - 1. It is recommended to adjust to an appropriate tightness during use (you can slowly adjust the tightness according to the experience during use), leaning against the sofa or chair for better fit, more uniform force, better effect and better comfort! 2. It is recommended to use 1-2 times a day for 10-20 minutes each time. Remember to rest with eyes closed for 3-5 minutes after use, the eyes will be more comfortable. 3. Use after charging the product 4. Product cleaning - Use a wet