Glowdoggie Leuchtie 2018 LED Safety Collar, Red Classic PRO, Size 18" Made in Germany, not China. Superior, lasting quality your dog deserves. 100% Waterproof. 100 hours max of shine time with 2x AAAs. Constant, solid glow. Can also use rechargeable batteries if desired. 2 year warranty. Ongoing customer support and repairs. Free shipping. Delivery within 3-5 business days after order. Size relates to your dog's head circumference. Please see sizing details below. A dedicated safety device, cannot be attached to a leash.