The high-visibility Nite Dawg II LED Collar features a bright red LED that illuminates fully around your dog\'s neck, and even has passive reflectivity striping for optimum visibility. The LED is visible up to 1000 ft, and can be set to glow or flash modes with the press of a button, and you\'ll find the easily replaceable batteries can run for up to 100 hours at a time. Made from a high quality nylon, this lightweight, durable collar is also highly water resistant for the water-bowl-splashers and the dogs who just can\'t resist jumping in every body of water they see. High visibility collar with bright red LEDHigh quality nylonStrong metal D-ring and quick release buckleGlow and flash modesVisible up to 1000 ft1x replaceable 2032 battery includedBattery run time: Glow: 75 hours Flash: 100 hoursMedium fits: 13\" - 18\" 33cm - 45.7cm