1.These window decals work as a bird strike deterrent,stop birds from hitting your slider glass doors. 2.Self adhesive, easy to set up and remove, no mess. Can be applied to inside or outside. 3.Holographic reflection, gives a dazzling light to help birds see windows thus keep birds away, avoid striking the glass. 4.Rainbow window clings are static clings.Clean the window , Peel off the back film,Stick them on the glass as you like. It is recommended to apply outside. Before installation, make sure your surface is clean and free of any tinting, film, coating and other ornaments. 5.You can remove them if you need to wash your window, and reinstall them after washing. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!