🐕UPGRADED FULLY ADJUSTABLE: Softer, and more comfortable, it has a larger adjustment range to grow with your dog, no need to waste money on bigger collars as your dog grows up. 🐕SAVE YOUR DOG'S LIFE: Better light transmission, brightest than others, keep man's best friend safe by alerting distracted drivers, and traffic before their headlights are on you and your pup. 🐕Micro USB RECHARGEABLE: Full charges about 2 hours then you can walk with your baby for a week (1 hour/day). No need to replace the battery for such rechargeable led collars. 🐕WEATHER-RESISTANT: Good for all weather conditions, water-repellent, not for dog swimming. 🐕HIGHLY RECOMMEND: Best gift, let your furbaby out of the house worry-free. If you have any questions or concerns about our product, our customer service team is always available to assist you. light up dog collars