describe: Safety Pet Collar: Helps you keep your dog safe by making it visible in low light conditions and in vehicles. When fully charged, the LED light is visible up to approximately 500 meters (1640 feet) at night. Cuttable One Size Fits All Dogs: When you receive the glitter dog necklace, you can cut it to the desired length, it is easy to cut because it is TPU material. Overall length is 27.5 long. Perfect for Spaniels, Labrador Retrievers, Retrievers, German Shepherds, Collies and more. WEATHERPROOF AND WATERPROOF: Suitable for all weather conditions, durable, waterproof and lightweight. It is made of high-quality TPU material with ultra-bright LED light to keep your pet visible and safe. Three light-up modes for excellent performance; Fast flash, slow flash, and steady light just press the on/off button; Lithium-ion battery provides unparalleled performance and is environmentally friendly. Package contents: 1 piece collar strap