This outdoor and marine survival light is designed to be a real lifesaver. It operates on a single AA battery & floats head up in water. Clipped to your body or gear, the AQUA STROBE is sure to get the attention of emergency services throughout the world. AQUA STROBE Includes: Alkaline Battery, Velcro Strap & Lanyard. SPECIFICATIONS: Flash Rate:Up to 70 Flashes per Minute Batteries: 1 AA Alkaline Burn Time: 8 hrs. Weight: 3.4 oz. with batteries