• 【Shake Awake Function】FB O４ red dot sight featuring(shake awake function). It will automatically power off after 2~3 minutes of non use . As soon as the sight senses motion, it will instantaneously wake up and turn on with any motion detection to last saved settings. you don't have to worry about turning it on or forgetting to turn it off. If the sight is manually powered off, the shake awake function will be turned off simultaneously .
• 【Multi-reticle system】the reticle is very crisp and clear and it is have different options to choose from（3 MOA Dot / 45 MOA Circle / 45 MOA Circle and Dot）using the circle dot reticle makes target acquisition quick and easy. 1 MOA per click adjustments, and 90 MOA adjustment range .
• 【Brightness Adjustments】red dot sight has 8 illumination settings for daylight use and 2 night-vision settings for low light conditions.
• 【Quality Assurance】We provide a limited lifetime warranty form the date of purchase on parts and workmanship to the original purchaser.