1.独特的配重、防倒设计；
2.顶部增加了挂扣可加链条；
3.印刷LOGO部分有八角椭圆、梯形三种选择；
4.顶部可夹警示灯。

1, Unique counterweight design, could stand stably;
2, With hang buckle on the top, could hang on the train;
3, There are three shape for the part of logo printing, those are octagon, oval, and trapezoid.
4, Could add caution light on the top of the warning sign.