SpotLit Clip,LED Keychain Light-2Pack - Mini Lightweight Halloween Accessory - Dog Collar or Leash for Night Walks -Red (Bb8) The lightweight of the mini led light makes it perfect for all-weather dog collar charm or dog collar light with its weather resistant clip. Your pup can be safe and seen playing in the dark. Easily Replaceable Battery - No tools needed to replace the CR2032 battery. Durable and Water Resistant - Take it on all your adventures! Multiple Settings - Steady On, Slow Flash, Quick Flash, Off 70-120 Hours of battery life; Easily Replaceable CR2032 Battery - No tools needed