Durable Material The dog collar is made of high-quality durable nylon material with neat ing and soft padding to prevent chafing on your dog's skin and fur, ensuring a comfortable fit. High Visibility Stay visible and make sure your pet is easily seen by cyclists, pedestrians, drivers, and other traffic participants. Your dog remains visible in low-light conditions and stands out from others during walks, jogs, or outdoor activities. USB Rechargeable This LED dog collar features smart USB charging technology with a built-in Li-ion battery. Full charge time is approximately 1 hour. The collar is waterproof and designed to perform in various weather conditions. Weather Resistant, Durable and Lightweight The light tube of the LED dog collar is durable and waterproof, suitable for everyday use in normal weather conditions. It is lightweight and equipped with super bright LED lights to keep your pet visible and safe. (Not intended for submersion in water or extreme weather conditions such as heavy rain or swimming.) Adjustable Fit Each LED dog collar is adjustable via the buckle closure and includes a heavy-duty D-ring for secure attachment to a dog leash. The total length is 70cm and can be trimmed to fit smaller sizes as needed.