Specification:

1. 1. LED: 5W Nichia LED lamp
   2.  Li-ion rechargeable battery: 1 pcs, 3.6V 2350 mAh
   3. Charging input: AC100-240V
   4. Charging output: 5.0V 1000 mAh
   5. Charging time: 3.5-4.0 hours
   6. Active time: 4-5 hours (max lumens)
   7. Max illumination: 500 lumens
   8. Storage temperature: -20? to 60?
   9. Operation temperature: 0? to 50?
   10. Waterproof: IP 65
   11. Weight:255g
2. Usage:
   1. 3-Mode LED Indicator:During charging, red light(recharge light)on.After fully charged blue light on.During using, yellow light on.
   2. When the battery is installed with the wrong side, it will be power off  automatically.
   3. Fasten the buckle strap together with the helmet. Or fasten the buckle strap on head.
   4. Hook the helmet for stable.
   5. Turn on the power and fine tune the lumens you desired.
   6. Zoom the LED for ideal range and adjust angle of light to work.