battery power,white and red led light pin badge 1,Howitworks:ScrewingthepintightlymakethebatteriesconnectwiththePCB,thebadgeswillstarttowork(flashingwithcolorfulLEDlight)untilitunscrewed.Theinsulationfilmwillseparatthe batteryfromthePCBtoofftheflashingpower. 2,Thebadgesareveryattractiveandsuitableaspromotiongiftsduringthefestivals. 3,Plentyseriesofbadges,suchasflags,animals,love,cartoon,sportsuperstarscanbeselected. 4,Customizeddesignsareaccepted.Thebadgescanbemadeinvariousshapes,sizeasyouwant. 5,Thematerialofthemareenvironmentfriendly. Product Specifications:Size: 4 x 4 x 2cm With gray rubber One red flashing LED Press button to activate Uses two pieces of AG3 batteries to make it flash we can customize according to customer's design . Item:flash pin badge size :3-7cm diameter flashing pin material:plastic ,tin ,led lgiht offset print : full color battery:1pc 1-3 pcs flashing light flashing lgiht color ; white light,red ,blue use for promotion Flashing badge is best for discoes, night clubs, parties, bars, promotions, sport events, concerts,festivals. Long life batteries include, safe magnetic clip, light weight. - To activate, twist backing clockwise. To deactivate twist counterclockwise. - Piece attaches magnetically. - To attach, remove magnet on back of the piece. Hold magnet behind shirt (or desired location) and attach piece on opposite side. - We have Magnet , Military Clutch , Safe Pin for choosing . - Also you can select the switch button styles in the back.