... multi-functional light up flashing clip-on marker refective material fashion,durable, waterproof suit for ... marker1.This multi- functional light up clip on marker provides you with high and instant visibility whenyou go ... a outdoor sport. 2,The design: a,the magic stick can be adjustable b,push button switch, c ... 3.multi-function:this light up flashing clip on marker can be suit for arm, bicycle, travel ...