Installation method: 1) The items back with auto adhesive glue. 2) Clean the suface where you want to stick. Keep dry and clean. 3) Please do press hard especially on the edges at least 2 mins after installing. 4) If the weather is cold.Please use the hair dryer(hot air blowing)in order to provide the best connection. 5) Please don't touch water and Keep dry after been install at least 72 hours. Or it will easy to fall off. All orders will shipped within 24 hours! If You Need Help Or Have Questions About You Order Please Contact us We Hope You Never have zhe need,but if you do,our service is friendly and hassle-free