Love to ride? Then you'll love Light Up Bicycle Flashing Pins! The perfect pin for bicycle enthusiasts and fans alike, wear your LED Bike Pin to races and marathons, here and abroad. Whether you're biking with your bicycle group or in the Tour de France, Flashing Bicycle Pins are for you. To activate Flashing LED Bicycle Pins, remove the pull tab and press the button on back for 1 flashing function. Pin Dimensions: 2.4" x 1.38". Bicycle Pin comes with safety pin attachment for each wearing. Light Up Flashing Bicycle Pins come with 2 replaceable CR927 Batteries.