The red dot sight will not turn on, what do I do?Updated 3 years ago

First, be sure you have a fresh battery installed. 

Confirm the battery is facing the positive side up and firmly press the battery into the battery holder. Tighten the battery cap back on the red dot sight.

Turn the unit on and adjust the brightness settings to confirm the unit is back to working order.

If your red dot sight still has no do or illumination, it may be defective. If the unit is defective, begin the warranty process.