Application instructions are included for each vehicle Installation Method: Easy to install by simply fixing it with strong 3M double-sided tape and double fixing it with mounting hardware. Please take it on a day as good as possible. Also, if the temperature is low, the adhesive strength will weaken, so please warm it with a dryer. Please use a cleaner to make sure that the door visor is attached to the surface of the door visor is properly wiped off before putting it on. It allows you to comfortably ventilate your room even on rainy days. It is also important to incorporate outside vehicle information, such as noise of a breaker or emergency vehicle siren while driving. For your safety, turn the glass down a little while driving In areas with high snowfall, it is also effective in preventing snow from entering.