Makes your Dog Visible, Safe & Seen. THIS WILL SAVE YOUR DOG'S LIFE - Vehicles will see your dog well in advance with this bright collar - ALL THE TIME. USER-FRIENDLY, COMFORTABLE, FULLY ADJUSTABLE - Change the light between quick flash, slow flash or steady mode with just a push of the button. One size fits most. Simply cut to the size needed. Fits dog's necks all the way up to 27.6" USB RECHARGEABLE & LIGHTWEIGHT - No hassle with replacing batteries and no extra costs.