Purchase Notice: 1.The product may not come with installation instructions, if necessary, you can contact the seller to obtain the installation tutorial video. 2.This is a repair or replace only item. If the product encounters a problem or needs to be returned, please communicate and solve it with the seller first. Items sent back to us without first requesting a return will not be accepted. 3.In case of upgrading to the appearance and structure, no further notice, the real object shall prevail.