YAMAY&reg; Nylon Water Resistant USB Rechargeable LED Lights Flashing Pet Cat Dog Collar Glowing Lighting Lighted Puppy Collars Fashion Light up at Night Safety for Small Medium Dogs Female Male This LED Lighting Dog Collar is stylish, durable, light-weight, flexible, easy to store, and fun to use. Each LED Lights Collar is made of Super-Sturdy Nylon and Satin, Colors including red, orange, yellow, green, blue and pink. You get 60 hours of steady light, or over 100 hours of flashing light with each collar and leash set. Normal 4-5 months; battery can be replaced. All batteries in each set are replaceable, and you can choose from two flashing speeds and one steady light speed. 2PCS CR2032 button battery 100% Brand New and high quality; Certification: CE, ROHS, EN471.