Safety Smart Gear last week and they are great! Not to mention the price because they are on sale for $6.97 right now!! It fits over the collar they already have and you can turn it on solid or so that it flashes. Easy to replace with a lithium battery too. I also ordered one L.E.D. leash for Foyle to make him even more visible because, quite frankly, drivers around here feel it isn't necessary to stop at signs any more. I bought the red, but maybe I'll just have to get the blue too.