We see that tempered glass has many advantages. First, the strength is several times that of ordinary glass, the bending strength is 3 to 5 times that of ordinary glass, and the impact strength is 5 to 10 times that of ordinary glass. Safety.
I heard this system from one of my friends, he said that it only takes 30 mins to upgrade the key to a totally intelligent one, the upgrade gives greatly comfortable experience to me.