Kai Guang(Bi Xie Hu Lu), can be a key chain, put in bag, just need be with you

to avoid those bad things come to you, especially you always drive at night, travel, vacation, like to go jungle, you should have this tools to protect you it will give a sifu from temple to “kai guang”, then only will ship out to you(that's why will take time on it, hope you understand)

PS:do not open it, else no more power on it,

if one day you realise it already open, means that help to to ''dang zai'' already,