Marker Band:~ Made of reflective, durable material, it holds a 100,000 hour LED bulb and flexible polymer strip that can be seen up to a mile away. The elastic band and quick release buckle closure make it simple to adjust a comfortable fit. Choose from two modes - steady glow or continuous flash. Powered by easily replaceable CR2032 battery (included).
• Bright red LED for active illumination _ glow or flash modes
• Passive high visibility reflective material
• Easily replaceable CR2032 3V lithium battery included
• Adjustable size elastic strap fits: 5.5" - 25.5" diameter