Roglite safety light allows extra visual safety when walking your dog at night. Or for those dogs that like to take themselves off to do their own investigating, help others easily see them to ensure their safe return home. Can be clipped or hung onto any collar, lead or harness. Has two light settings, light glows continuously or set to flashing. Available in Blue, Red, Orange, Pink or Glow. Size: 31mm. Batteries provided.