This collar lights for dog , with lighting, LED embedded blue 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. Loop steel. Adjustable. Material : nylon. Water resistant. With 5 different sizes, you will definitely find the necklace appropriate to your dog. Very practical, this necklace is charging by micro-USB cable provided. Also available in pink and in yellow. Note that the collar 18 to 27 cm round neck only works on the battery.