The Sig Sauer Echo MV50-DV thermal monocular delivers advanced thermal imaging with 640x512 resolution and variable 1.5-24x magnification through a 50mm objective lens.Sig Sauer Echo MV50-DV Thermal Monocular640x512 resolution with 12 microns 50 Hz refresh rate1.5-24x variable magnification with 50mm objectiveField of view: 17.10 - 8.70 ft @ 100 yards10-hour battery life with internal & 18500 external battery optionsWeighs 21.20 oz for portable operationIdeal for tactical operations hunting surveillance and search and rescue applications where reliable thermal detection and identification capabilities are essential in all weather conditions.