Light up LED Pet/Dog Collars - Weather Resistant &ndash; Durable, Flexible Illuminated Glow Pet Collars Keep your dog safe and seen and Give your dog a cool glowing look Available in 4 sizes S/M/L/XL 7 different colors to choose from Red/Yellow/Orange/Blue/Green/Purple/white Three different light modes: 1) steady light 2) fast flashing light 3) slow flashing light Two CR2032 Changeable battery included