FDA REGISTERED: The product drop smart eye drop guide is FDA registered, and the registration number is 3022079606. EASY TO FIGURE OUT EASY TO USE Comes along with a detailed instruction sheet that will demonstrate step by step - from opening the box untill after putting in the drops - how to use the guide. This way, you're sure to have a pleasant experience using your eye drops. UNIQUELY AND SAFELY DESIGNED: Shaped to fit comfortably over your eye. Safely designed to keep the bottle tip far and clear of your eye, to reduce the risk of injury and infection. in addition, its unique design, with a small hole on top, allows light through to make it easier for you to use. WORKS WITH MOST EYE DROP BOTTLES: Designed to work with most standard eye drop bottles; if it didn't fit with your bottle you can easily return it within 30 days of purchase. " WARRANTY: We promise every customer a shopping satisfaction, feel free to reach out to us if you have any questions or issues about your purchase, we will reach out to you and do the best to help you. "