e flashing LED is visible up to 200 meters. A reflective strip under the lights adds a lovely flashy boost, making the collar glow. Both You and Your Dog Safe Since It Allows Drivers to See You at Night Speciality: Model: CIPC002 Material: Nylon Width: 2.5cm Size: S: 30-38cm M: 36-44cm L: 43-52cm XL: 50-58cm Color: Red/Blue/Green/Purple/Yellow/Black/Orange/Kelly Power: 2*CR2032 Battery Life:over 70 hours