1. SAFE AND POWERFUL: The lighted dog collar is so bright and easy to see; it is made of a silicone tube with a light guide that allows your pet to be seen at night to avoid your dog coming from vehicles some potential dangers 2. Adjustable Size: The length of the lighted dog collar is 27.5"/70cm, it is easy to cut to fit the size according to the dog's neck; a pair of wire cutters or blades can easily cut the plastic tube to the right size 3.3 lighting modes: The bright collar is equipped with 12 LED lights, which can be set to flash quickly, slowly or continuously; the slow flash lasts the longest; it is light in weight and will not be a burden to pets 4. Waterproof: LED dog collars are excellent in waterproofing, even if it rains, your pet can wear this lighted dog collar comfortably; Note: Swimming or full immersion is not recommended