... .2pcs of CR927 batteries LED flashing badges It is a best choice for Christmas HolidayFlashing ... atmosphere happier and more colorful.Of course, it is also an effective way to increase your ... white light,red ,blue8.Used for promotion gifts1,How it works: Screwing the pin tightly, making the batteries ... work(flashing with colorful LED light),when it unscrewed,the insulation film will separate thebattery ...