- Adjustable Light Up Dog Collars: Choose from 4 sizes to ensure the perfect fit for your dog: S (11in-15.7in), M (15in-19.7in), L (19in-23.6in), and XL (21.6in-27.5in). Measure your dog's neck circumference with a soft tape measure to select the appropriate size. - Enhanced Safety for Your Pet: Our glow dog collar features Dual LED fiber technology for heightened visibility. The super bright light provides up to 1000 feet of visibility, ensuring your dog can be seen in low-light conditions, which is crucial for nighttime safety. Choose from three light modes: solid, fast flashing, and slow flashing. - Convenient USB Rechargeable Design: Easily recharge your light up dog collar with the included micro-USB cord. This eco-friendly option allows for up to 10 hours of continuous use on a full charge, making it perfect for tracking your dog during evening walks, camping trips, or nighttime adventures. - Durable and Waterproof: Constructed from strong nylon material, our LED dog collar is built to withstand the wear and tear of active pets. The waterproof design ensures your dog can enjoy walks in rain, snow, or adverse weather conditions. However, it is advisable to avoid prolonged exposure to deep water or seawater. Use scenarios: - Perfect for evening park walks, keeping your dog visible to others. - Ideal for camping trips, allowing you to easily track your dog in the dark. - Great for winter walks, ensuring your pet is seen even in snow or rain.