This optic scope is powered by real fiber source, providing clear reticle illumination at day and dark circumstance.  But it can't work in full darkness. The optic scope also provides chevron reticle. 

Features 

- High quality metal 

- Solid construction and heavy for its size 

- Compatible with 20mm rails 

- Can be switched between red to green 

- Added holographic sight 

- Improves shooting accuracy 

- Battery included