To wear your badge and look really hip - Get a light up lanyard with a badge or key clip. They can hold badges or keys as their loads and the lights can be set to three different modes. Just press the button - it takes no skill - use fast flash or slow flash or set it for still. This lanyard is perfect for any to grasp. One size fits all since it has a great clasp. Height: 18.87 in. , 47.92cm. - Width: 1.25 in. , 3.17 cm. - LED Colors: 8 Blue - Batteries: Batteries for this item are NOT replaceable.