Nite Ize SpotLit Rechargeable Collar Light - Disc-O Tech

From Appalachian Outfitters

See Spot Run The SpotLit Rechargeable Collar Light gives you the extra eye and peace-of-mind you need while your dog explores the outdoors from the backyard to the dog park to the campsite. Simply clip the light onto virtually any collar and give it a push to bring it to life. Featuring a Disc-O Tech LED module you can leave the light in color-changing Disc-O mode letting the vivid colors cycle through or select from 4 colors of red green blue or white setting any of them to glow or flash. Its built-in memory feature remembers your last color setting automatically turning back on in that setting for the next night of fun.