... on the products for promotion.Customized logos and shapes are welcomeSuitable for celebrationOEM/ODM orders are welcomed1.Item:flash pin badge2. ... red ,blue8.Used for promotion gifts1,How it works: Screwing the pin tightly, making the batteries connect with the PCB,the badges will start ... side.- We have Magnet ,Military Clutch ,Safety Pin for choosing .- Also you can select the switch button styles in ...