ENHANCE NightLUX NKL Nighttime Activity LED Shoe Caution Light with Solid Beam and Flashing Bright Red Lighting Modes - Perfect for Dog Walking , Children Safety , Neighborhood Watch and More The ENHANCE NightLUX NKL Nighttime Activity LED Shoe Caution Light offers ultra high visibility from dusk until dawn. Perfect for Dog Walking , Children Safety , Neighborhood Watch and More Features two LED lighting modes: Solid Beam and Flashing Designed with plastic teeth that grip that back of your shoe to prevent it from moving or falling off. The light expands to fit anything between 1 inch and 3.75 inches Uses two CR2032 Batteries for power. Each package includes a total of 4 batteries Backed by a 3 Year Manufacturers Warranty