NIGHT SAFETY GUIDEAre you afraid of losing your dog while walking at night? Our light up dog collar will help eliminate these problems. Our ultra-bright dog collar is super bright and easy to see, allowing you to maintain 500 yards of visibility in low light or no light conditions, allowing distant drivers, cyclists and joggers to see you in the dark. advance the night. HIGH QUALITY MATERIALThis LED dog collar is made of nylon and PU leather, which is durable and waterproof. This flashing dog collar is slightly waterproof, don't worry about walking the dog in light rain every day, but please don't let the collar soak in the rain or wash the collar for a long time, wipe it gently to make sure it works normally. (Note: Please do not wash and soak in water). FULLY USB RECHARGEABLEThis personalized dog collar is USB rechargeable (charging cable included), more economical and eco-friendly. environment. The battery has a large capacity, it takes about 2 hours to charge, and it can be used continuously for 6-10 hours under constant light mode. (Note: Please charge the battery for at least 2 hours before first use.) Be sure to measure your dog's neck before ordering, don't just choose a size based on the weight or breed of your dog. Size M: 15.7-19.7" (approximately 40-50cm); (NOTE: adjustments are not limited to the black nylon adjustment area) SAFETY IS OUR PRIORITY: Night light is one of the key factors to keep your dog safe.Our LED Dog Collar features a brighter light design with up to 500m visibility and a safe night light .A flashing dog collar helps spot your dog on snowy streets, forests or driveways at dusk.Our dog collar lights help vehicles on the road spot your dog. How to measure collar size? The light up dog collars come in three adjustable sizes.When measuring the neck circumference, please leave enough space between the dog's neck and the collar, then choose the correct size for the measured length. Specification: Material: Nylon + PVC Leather Battery Life: 6-10 hours (continuous use in constant light mode) Color: Green/Pink/Blue/Red/Colorful Size and weight: S: (11.8-15, 7 inches / approx. 30-40 cm) neck circumference - 69.2 g M: (15.7-19.7 inches / approx. 40-50 cm) neck circumference - 76g L: (19.7-23.6 inches / approx. 50-60 cm) neck circumference - 83.5g What will you get 1 LED Dog Safety Collar (Rechargeable Batteries Included). 1*USB Charging Cable Good Tips: 1. When the power is low, please charge it in time. 2. Do not wear it when swimming. 3. Charging display: red when charging, green when fully charged. (Note: Please charge at least 2 hours before first use, and you only need to charge it for 2-3 hours when you use it again. Do not charge the collar for a long time.)