1. High visibility and safety - LED dog collars are bright and very visible to car drivers, walkers, joggers, cyclists, motorists, etc. The collar is made of transparent light guide tape and light-transmitting mesh webbing, which greatly improves the safety of your dog's walking at night. 2. 3 MODES AND LONG-LASTING LIGHT - Dog light collars are available in 3 colors (green/blue/pink-red light), 3 light modes are switchable to ensure the duration of the night. Fast flash > 8 hours, slow flash > 10 hours, steady light > 5 hours. 3. Weatherproof - The glow in the dark dog collar is made of high-quality mesh with ABS snaps, rust-proof D-rings, and a weatherproof rubber charge seal, which is lightweight and durable. You can use it to walk and play in all weather conditions and climates. (Not recommended for swimming) 4. ADJUSTABLE SIZE - Each size of the lighted dog collar can be adjusted through the buckle. It can be adjusted to different sizes as the dog grows. (Due to the thickness of the guide belt, the length needs to be carefully adjusted)