Pawz LED Light Up Flashing Safety Nighttime Visibility Dog Puppy Collar by Prime Pet Source Prime Pet Source Pawz Light Up Collar gives you a sense of ease letting your dog out at night, with a flash and safety of fun Weather resistant and adjustable, perfect for all small dogs Powered by one simple 3 volt CR2016 watch battery Click on the button for 3 different light up modes: steady light, fast blinking light, slow blinking light Fun paw print design, bright, and long lasting!