Lightup Lanyard with Badge Clips have a quick flash setting, a slow flash and a still setting that can all be activated by squeezing the red button. Each soft, nylon lanyard has a pull-apart clasp so one size fits all. Dimensions: Height: 18.87 in. Width: 1.25 in. LED Colors: 8 Red Comes ready to use with 2 replaceable CR2016 batteries.