The Ultra Dot L/T is engineered to give you the advantage of a red dot sight in a compact lightweight design whether you use it on a handgun shotgun rifle or bow. The achromatic reflex BK 7 optical lens produces a clear high resolution image and is 26mm in diameter allowing a wide field of view. The reflex lens has a 27 layer special coating to eliminate double dots or split images. Ultra Dot sights let your eye concentrate on the target where the red sharp aiming dot is superimposed. Like all Ultra Dots the L/T is backed by our Lifetime Warranty. - The Ultradot L/T has always been a high performance compact sight but we felt it could be even better. So we redesigned it with features you've asked for and the results are outstanding. Auto-Off Push Button Brightness Adjustment Brightness Memory Precise 4 MOA Dot Size Increased Water Resistance and a Built-in Rail Clamp System. Don't let its small size fool you. - Dimensions:51 x 28 x 37mm - Weight: 58g - Sight window:25.76 x 22.01 - Battery: CR2032 3V Lithium - Windage adjustment range: 305cm @ 100y - Elevation adjustment range: 457cm @ 100y - Dot size: 4 MOA - Dot brightness adjustment: 10 settings - Parallax Free @ 100m - Shock proof: 1000g - Waterproof: Waterproof