Describe Shelf life:3 years 1. Made of medical-grade silicone, it's soft, skin-friendly, and non-irritating, ensuring comfortable and secure wear, suitable for extended use. 2. The unique dual-ring design of a sperm-locking ring and a foreskin-blocking ring effectively delays ejaculation, improving intercourse quality and couple satisfaction. 3. Utilizing a physical delay mechanism, it's drug-free and scientifically designed to fit the human body, making it easy to wear and clean. 4. The two-person design allows for multiple uses, perfect for couples seeking daily sexual enhancement and daily care for men with sensitive skin. 5. Suitable for a variety of sexual situations, it helps improve stamina, restore confidence, and foster a high-quality intimate experience. Precautions: 1. Keep out of reach of children to prevent accidental ingestion. 2. If you feel unwell, stop using immediately. 3. Do not use on damaged or swollen skin. 4. Store in a cool and dry place. Comment: 1. The manual measurement tolerance is 2-5g, please do not mind your replacement 2. Due to differences in different displays, the images may not reflect the actual color of the product. Thank you very much