This product is light and durable.You can hang them easily on your rear-view mirror. It will not cause any stress to a properly secured rear view mirror while in use and can remain hanging from your rear view mirror for any length of time.Decrease your stress levels in the car. When you are anxious to go to work or stuck in a traffic jam. They add a little fun to your ride.Other Usage: Hanging on mobile phone, Key chain, Clothing, Necklace, home decoration.A good gift choice for anyone. Perfect present for Birthday, Valentine's Day, Thanksgiving, Christmas, Graduation and any Occasion.Note: Data are all measured manually, please allow for an error of 1-3cm. Due to differences in light and display, there may be a certain color difference, which is subject to the actual object received.