Nite Dawg, Gray, LED Collar Cover, Durable, Weather Resistant & Lightweight, Super Low Profile, Flexible Led Illuminated Strip Fits Comfortably Over Almost Any Dog's Collar & Closes Securely With 2 Micro Hook & Loop Tabs, Bright, Light-Transmitting Polymer Core Is Illuminated By A Super Efficient Red LED Bulb With 2 Mode Settings: Flash & Steady Glow, Housed In A High Quality Thermal Plastic Urethane Exterior, Visible Up To 1,000' In The Dark, Powered By A Long Life, Easily Replaceable Battery, Included, Decorative Paw Prints That Provide Passive Reflectivity For Visibility Even When Not Illuminated.