Our Green Sound Activated LED Badge will light up your nighttime event. Each green LED badge measures 4.5" high by 3" wide and comes with a 38" white breakaway lanyard attached. Slide the switch up for sound-activated lights. Slide the switch down for steady on lights. With the help of a green LED light at the top of the pendant, the light-up green badge lights the night, allowing runners or dog walkers to be seen and is perfect for party-goers or decorations to brighten up the room! Sold in increments of 1 badge. Our Green Sound Activated LED Badge has 2 replaceable CR1220 comes with batteries included and installed.