Safety and Visibility: The LED dog collar is made of high-density wear-resistant nylon webbing.When the night driving lights are on, the reflector bar and LED light source glow.Good warning function can protect the safety of pets. Waterproof: S: Length 40CM Width: 2.5CM M: Length 50CM Width: 2.5CMThe material of The dog collar light is upgraded to waterproof material. You can take your pet with you on rainy days without worrying that the collar will no longer glow after being exposed to water. Magnetic Charging: The LED dog collar supports charging of any USB device, it can be fully charged in two hours, can stay on for ten hours, and will automatically disconnect after being fully charged. 3 Lighting Modes: just lightly press the power button to switch to three lighting modes: fast flash, slow flash and constant light. We can switch at will according to the scene and needs to make your pet cool.