USB Rechargeable LED Pet Dog Collar w/ 3 Variable Light Speeds - Blue and White Rechargeable LED lights using any Micro USB cable / port. Saves time and money for expensive batteries.Package contain the Dog Collar and a USB a charging cable. A safety pet collar that help keep your dog visible at night or poor weather conditions. Protected in durable nylon mesh, the lights are available in 3 settings: Steady, Fast Flashing, and Slow Flashing. The durable buckle keeps this collar securely in place, and the metal D-ring helps you secure your dog's leash to the collar. Approximate Dimensions: 17" L X 0.75" W; Adjustable circumference: 10" to 15". Please measure your dog's neck to ensure the correct fit.