Attach to your belt or your dogs collar with Velcro bands. Added safety at night and it's easy to operate.Made of sturdy, reflective material and secured with two hook and loop straps (one at each end) that are easily adjusted, our Magic Marker is a smart little illuminator. The super-efficient (100,000 hour) L.E.D. and flexible polymer strip emit a bright light that can be seen for up to a mile in the dark, increasing the visibility of anything—or anyone—it's attached to. Three modes to choose from: steady glow, continuous flash, or off. An excellent, ecologically responsible alternative to chemical glow sticks, the Magic Marker is shock-resistant, weather-resistant, lightweight, and battery powered (one easily replaceable lithium battery included)