Bright Red LED Illumination-Glow/Flash Modes Passive High Visibility Reflective Pattern 1 x 2032 3V lithium battery included 75 hr. battery life * Lightweight, flexible design; Easy to attach and remove - no tools required * Features strong hook & loop fastener to attach to nearly any helmet & Gear Tie Reusable Rubber Twist Tie for additional attachment options * Gear Tie - UV resistant - will not be damaged or destroyed by extended sun exposure -Won"t scratch or mark -Twist it, tie it, reuse it * Product Dimensions: 93mm x 54mm x 10mm | 3.7 x 2.1 x .4 inches; Product Weight: 20g | .7oz