With blinking teeth in your mouth good times never cease. So pick up a few of our flashing mouthpiece. Wear one while toasting or while you teach. Our flashing mouthpieces will light up your speech. Use them for men and use them for ladies. Use them for teens, but never for babies. Item Dimensions: Height: 1.1 in. , 2.8 cm. Width: 2.5 in. , 6.35 cm. Packaging Dimensions: Height: 5.75 in. , 14.60 cm. Width: 3.75 in. , 9.52 cm. Depth: 0.5 in. , 1.27 cm. LED Colors: Blue, Green, Red, Yellow Batteries: Batteries are NOT replaceable.