Flexible, lightweight design with bright Red L.E.D. light that flash or glow. Shock resistant. Visible from over one mile in the dark. Easy to replace battery - included. 200 hour battery life, 10,000 hour L.E.D. life. Reflective even when turned off! Magic: Attaches to belts or straps. Band: Adjustable elastic strap w/ quick-release buckle. Size: 11"-24" diameter. Clip-on: Attaches via swivel clip to zipper pulls, D-rings, etc.