The Adventure Lights Guardian Small Pet Light is a tough and lightweight safety light designed specifically for small pets. Waterproof to 30 feet (10m), impact-resistant and able to withstand extreme temperatures. Each light comes with a 4-inch Velcro strap allowing you to easily attach the light to collars, harnesses and leashes. When being seen is a priority, this light will flash for up to 72 hours. This sturdy and lightweight product is adapted from our classic Guardian dual-function light which was conceived for the military, where it is still widely used today.