You can walk your dog at any hour of the night without the risk thanks to this necklace bright ! This collar lights for dog with LED lighting incorporated is the safety accessory indispensable to your evening walks. Its lighting system has 3 functions to make your dog visible : fast flashing (flash), flashing slower and continuous lighting. Really resistant, this dog collar is nylon braided and protected against water drops. Its length is adjustable and a solid steel loop allows you to attach the leash. With 5 different sizes, you will definitely find the necklace appropriate to your dog. This collar works by either a battery (CR2016 included) that can be changed, either by micro USB cable (supplied) Note that the collar 18 to 27 cm round neck only works on the battery.