The Aviditi BC401-M LED Lighted Dog Collar will help you and others see your dog while out on walks at night or in the dark. The collar was designed with top quality components, including 4 different light settings: Slow-flashing, quick-flashing, non-flashing, and off (for daytime use). Light settings are easily changed with simple push-button operation. The collar is lightweight for your dog's maximum comfort, and the colorized riband over the light strip provides maximum durability and protection from weather and water. The LED lights are white and very bright to provide visibility up to 1,000 feet in the dark as well as daylight. This fashionable flashing nylon dog collar effectively protects your dog from pedestrians and car accidents. It is shock-resistant, so it's ideal for the active dog. The durable plastic buckle snaps securely and won't come apart until you release it. Adjustable. Color: Black with white LED lights. Size: Medium. Measures: 0.79-Inch x 15.7-19.7-Inch (2.0cm x 40-50cm).