1. 5 super bright white LEDs, Every LED brightness: 15000-18000MCD, LED life time is 100,000 hours. 2. Material: ABS plastic. 3. Product size: 60×35×45mm. 4. Powered by 3×AAA batteries(price not included). 5. Suitable for outdoor& activities. 6. Adjustable inclination & Elastic head strap.