The Sig Sauer Echo Thermal Monocular delivers advanced thermal imaging with 2-16x variable magnification and a 35mm objective lens for superior heat detection and target identification.Sig Sauer Echo Thermal Monocular (Model SOEC42200)2-16x variable magnification with 35mm objective640x512 resolution with 12 microns 50 Hz refresh rate10-hour battery life with internal and 18650 external battery optionsLightweight 19 oz design for portable operation12.40 ft field of view at 100 yardsIdeal for hunting surveillance search and rescue or tactical applications where thermal detection is critical. The variable magnification and high-resolution sensor provide clear thermal imaging in complete darkness or challenging weather conditions.