The Infiray Tube TH50 is a great mid to long range 640 x 512 thermal, it has a 50mm lens with a higher base mag of 3.5 which allows for exceptional quality image and accuracy at long distances from 35m out to 400m, offering a relative narrow field of view. Great choice for Deer, Kangaroo and pig Harvesters as well as recreational pursuits, setup for success for long range accuracy. Though NOT the best for close range moving targets such as taking out pigs on the run, not impossible but this optic is better suited for stationary targets. All units in the Tube series are easily mounted using traditional 30mm rings often fitted to a picatinny or weaver base rail. The stand out feature of the TH50 is its industry first one inch screen with a whopping 2560px × 2560px display, offering a next level viewing experience. The TH50 includes Two built-in 18650 batteries + one replaceable 18500 battery with a running time of up to 11 hours. The traditional-style 30mm Tube meets the needs of professional hunters who value traditions and seek technological superiority, ensure an extreme detection range of up to 2361 meters.