What is pet safety light ?

Pet safety light will help pet and yourself safe at night during walks or just when you are out and about! Pet Blinkers attach easily to collars, leads, and harnesses. They are water resistant and visible up to 1/2 mile. Each Pet Blinker comes with one flashing button light, stainless steel clip, and three AG3 batteries (already installed). Pet Blinkers come in a variety of flashing colors, and are lightweight and easy to use.

you can buy it here and here