7 Colors LED Lights Dog Collars Night Safety Flashing Nylon Nylon LED collar helps keep your pet visible up to 350 yds. Choose from 3 modes—on, strobe and blink. Comes with a slim bulb strip and a small on/off box, which works in any weather condition. Battery operated two small battries easy to change last for hours and hours Adjustable in each size so can grow with puppies or unsure about exact fit just need the range. Light tube removable for easy collar washing