1. The time for each use of the Diamond Long-lasting Ring should not exceed 30 minutes;
2. The interval between using the Diamond Long-lasting Ring again should be at least 60 minutes;
3. Use of this product may cause blood vessel damage or rupture;
4. Do not drink or drink alcohol Use the diamond ring while taking medicine;
5. Use the diamond ring for a long time (if you wear it for a long time and do not take it off), it may cause permanent damage to it. Do not sleep with the diamond ring on;
