Main features:- Made of high-strength aluminum alloy・ durable and can be used horrific environment.- Crystal clear fully coated prism lens for maximum light transmission.- Excellent choice for hunting・ sport shooting and other heavy duty applications.- Two-eyes open sighting design enhances target acquisition speed and situational awareness.- The Parallax designed red dot eliminates any need for centering.- Allen head screw type windage and elevation click adjustments with locking screw.- Built-in mount base for easy sight remounting.- No magnification・ the shooter need not worry about parallax or eye relief. - Long eye relief makes red dot sights appropriate for firearms with heavy recoil that might drive a conventional short eye relief telescopic sight into the eye of the shooter.- It can be mounted at any distance from the shooter's eye with no issues of focus・ this leaves plenty of room for night vision equipment.- Miniature red dot sights are becoming increasingly popular for use on pistols・ both for competition and military applications.- Powered by 1 x lithium CR2032 battery (not included).