X-vision optics all-new thermal reflex sight (tr2) in the flex series is by far the best bang for your buck when it comes to thermal units on the market today.With a detection range up to 1700-yards, this incredibly compact sight produces crystal clear images on its 2.69" amoled display.The flex 2 also features a quick-release picatinny mount and ip67 weatherproof rating so it will hold up in any terrain and tough weather conditions.This thermal reflex sight has a 1,700-yard detection range and a 750-yard recognition range.At a high frame rate of 50 hz, the device captures sharp thermal images and smoothly tracks rapid motion in the distance.The objective lens is 25 mm in diameter and has a field of view of 55 ft @ 100 yards this thermal reflex sight has a 1 to 4x magnification with a thermal sensor of 384x288.Resolution: 800x600Magnification: 1-4xObjective: 25mmField Of View: 55 ft @ 100 ydsBattery: 18500 Li-ion RechargeableDimensions: 2.60" x 3.54" x 3.46"Weight: 1.05 lbsFocus Range: 750 ydsBattery Life: 5 hrs