led key ring badge,new key chian batteries:LR927/CR927 use as normal time one or two years LED :can choose red ,yellow , led key ring badge,new key chianbatteries:LR927/CR927battery:use as normal time one or two yearsLED :can choose red ,yellow ,green,blue.white.etc.backside: batteriesbutton:control by button backside .revolve the button is ok logo availablecan have several led