Enhanced Visibility: Illuminate your dog with three vivid LED flashing modes-fast, slow and constant-ensuring maximum visibility and safety during nighttime walks. | Long-lasting Performance: Equipped with a 250mA Lithium battery, this collar offers up to 8 hours of continuous illumination with just 1 hour of charging via the included USB cable, guaranteeing extended use without interruption. | Ultimate Waterproof Protection: Designed with revolutionary waterproof and dustproof technology, this collar is ideal for daily activities, including showers, rain runs, and even swims in the lake. Enjoy worry-free adventures while keeping your pet safe and visible. (Ensure the charging port is securely covered before water exposure.) | Customized Fit: Each collar size features an adjustable buckle, ensuring a tailored fit for your dog's comfort and safety. Plus, the Heavy-Duty D-ring seamlessly connects with any dog leash for added convenience during walks or hikes. | Lifetime Satisfaction Guarantee : Rest assured with our 100% lifetime guarantee. If you encounter any issues with your purchase, simply reach out to us, and we'll promptly resolve them within 24 hours, ensuring your complete satisfaction and peace of mind.