Nite Ize NiteHowl LED Safety Necklace for Dogs -With this ring around the Rover, you and everyone else will be able to see exactly where he is in the dark, from any angle and up to 1000 feet away.llumination has come full circle, literally. Our brilliantly durable NiteHowl LED Safety Necklace is made with a flexible polymer tube, illuminated by two bright LEDs and simply slides over your dog's neck for hours of nighttime fun & safety. Just trim the tube to a custom fit, give the button on the durable, weather resistant housing a quick press, and the entire collar lights up a full 360 degrees, making your dog clearly visible from all angles. The LEDs can be set to either flash or glow modes - great for differentiating more than one NiteHowl-wearing dog. But, as fun as it is (like a neon necklace for dogs!), the best thing about the NiteHowl is that it keeps you and your buddy seriously safe on those after-hours walks, romps in the park, and campsite moon-howling sessions. Two bright LEDsEasily slides over your dog's neck as a bright LED addition to an existing collarUniversal sizing: cut to fit from 12 - 27in 30.5cm -68.5cmGlow and flash modes360° of illuminationBattery run time: 60 hoursWeather resistant3x replaceable 1154 batteries includedWeight: 2.1oz