This bike headlamp is not afraid about water, so there is no worries when you ride in the rain, you can switch three modes of light as you want. Very Suitable for hiking, seek survival, night cycling, hunting fishing etc. 

High = 1200 Lumens, Medium = 800 Lumens, and Strobe mode.
Hold power button for 3 seconds while light is off, to switch to the 5 mode option, giving you two more settings: Low = 350 Lumens, and an S.O.S pattern. 

Best light for your outside activity !!
- Fits great on handlebars with easy rubber mounts
- Highest LED Quality Assuring you of a Bright, Long-lasting ride.
- Mount the External Battery Where it is Most Convenient With the Long Headlight and Battery Cords Provided.
Waterproof design, two size O-ring , even in blasting rain still normal use.