Illuminated nighttime conspicuity. Easy to wear spring-loaded roll-up LED adds instant illumination to arm, ankle, bag, straps...anywhere. Powered by a dual mode (glow or flash) red LED that lights up the entire wrap. Something from bicycling for visibility-conscious motorcyclers. Runs for up to 100 hours on easily replaceable 3V lithium button battery. 13.9"x1.5"x.4" 1.5 oz.