AGPtek Weatherproof USB Rechargeable LED Dog Collar -- Super Bright Glow & Flash; Improved Dog Visibility & Safety [Weatherproof] good for all conditions, adjustable & comfy for your dog. [Super bright for safety] Vehicles will see your dog well in advance, all the time. Modern LED lights GLOW & FLASH brightly & your dog glows & is highly visible improving safety. [Rechargeable USB design] by connecting to devices such as tablets, laptops, PC's, and smart TV's. USB rechargeable battery gives 5 hours of illumination per 1 hour charge. No more buying and replacing batteries means no added cost. [User-friendly light & constructed design] Change the light between steady mode, rapid flashing or slow flashing with just 1 click. Thanks to the easy-to-use clips the LED dog collar is no hassle to put on. On top of that, it's well-constructed and sturdily built.