we have specialized in flashing pin for ten years,LED color,quantity can do customized Flashing pin, magnetic flashing pin, led flashing pin, magnetic flashing badge, promotion gift1.Material:PCB+Epoxy resinic glue+hardware2.Attachment:a.LR926/CR927 battery(work life :24hours at least,and our offer include the battery)b.magnet or butterfly-clutch available on the back.3.Screwing the pin tightly ...