1.Adopt super capacitor instead of battery .No
environment pollution problem.
2.Adopt super capacitor instead of battery
increasing stud life-span.(Life-span more than5
years, warranty 2 years)
3.Compressive strength >15tons
4.With both LED flash function and reflective
sheet's reflective function .LED warning distance
>300M,Reflective waming distance > 60M
6.Special convex lens design,stud body could be
installed under ground to reduce traffic accidents.