Save Your Dog's Life - This light up dog collars offer an outstanding 1,000 feet of visibility so your pet is easily seen in the dark. Individual bulbs along the LED dog collar provide nearly 360 degrees of bright light, keeping your dog safe at night. Choice of three light modes (solid, fast blink, slow blink) with the push of a button so your dog is easily seen by cars at night.USB Rechargeable - Your lighted dog collar runs up to 8 hours on a single charge so you can track your pet camping, in the backyard, or on evening hikes. Use the included micro-USB cord to charge your light up dog collar from any device. Stop wasting time and money on hard-to-find batteries.Durable and Water Resistant - designed your light up collar with quality nylon, durable enough for the most active dogs. Water resistant means your collar can be used year-round in all weather conditions.Function:1.Bright glowing LED Flashing design, Help to keep your dog & other pets dog safe and anti-lost during walking in night.2.Waterproof,adjustable and comfortable for your dogXS = Width 2CM * Length 41CM, Suitable for neck girth: 28-38 CM S = Width 2.5CM * Length 44CM, Suitable for neck girth: 34-41 CM M = Width 2.5CM * Length 50CM, Suitable for neck girth: 37-46 CML = Width 2.5CM * Length 56CM, Suitable for neck girth: 41-52 CMXL = Width 2.5CM * Length 60CM, Suitable for neck girth: 42-56 CMSTYLE: USB ChargingFlashing mode: Three simple button settings, slow flash, flash and continuous light.Battery: USB charging - USB power adapter for charging(No more batteries, waste reduction)NOTE1.Please allow slight deviation for the measurement.2.Due to the light and screen difference, the item's color may be slightly different from the pictures, thanks for understanding. Nylon Collar