The Hartz Ultra Guard Reflecting Flea & Tick Collar for Cats and Kittens provides an added dimension of nighttime safety for you and your pet. The collar reflects when light shines directly on the reflective strip. Same great flea & tick protection! Features:Kills Fleas and Ticks for 7 monthsSafety Release SnapReflects Direct Light up to 300 ft.Use only on Cats.