Nathan Running Flashlight. Hand Held Torch Zephyr Fire 100 with Siren. LED Light for Runners, Walkers, Cyclist, Kids, Security. Handheld Dual Front and Back Light to See and Be-Seen. Rechargeable Battery. FRONT / BACK LIGHT -- This running specific flashlight features an integrated 24-degree downward projection angle to focus light on the path ahead of you during a run. A rear facing red LED gives you visibility from the back. SECURITY  Emergency siren built into the grip. Lighten up the path in front of you and make yourself noticed by people behind you. COMFORTABLE -- Comfy and adjustable hand strap allows for an effortless carry in either hand. Weather resistant. POWERFULL and ECONOMICAL -- Front: white LED has 108 lumens / back: red LED has 8 lumens. Lasts 5 hours on high, 8 hours on low, 15 hours on strobe. RECHARGEABLE  Li-Ion battery is rechargeable via Micro B USB port.