elp provide your Dog with increased visibility at night with our Energizer Rechargeable/Replaceable LED Dog Collar! The Energizer LED Dog Collars last up to eight hours per charge and charges using a micro USB charging system with intelligent charging. Chose from three different lighting modes with the push of a button. You can set the light to fast or slow flashing, or solid depending on your environment or desire. Our Energizer LED Dog Collar is also enhanced with reflective stitching, to help keep your dog visible at all times.