I recently purchased 2 collars, one for my moms black lab, my mom has a hard time seeing and at night with the collar on she can see her in the yard and if our black lab wandered in the front yard the collar helps drivers see her. The second collar was for a cat who would sometimes sneak out with dog, but with the collar we can see her and quickly grab her before. I loved them so much I purchased a third collar for my brother's new puppy. Great Product!