The Liemke Sperber-35 VOx Thermal Imaging Monocular is a durable, pocket-sized optic designed for field use. It features a field of view of 19 meters at 100 meters on an OLED display with 1280 x 960 pixel resolution. The Sperber-35’s uses two CR123 batteries allowing for a continuous run time of 3.5 hours. The max optical magnification is 2.5x, a max digital magnification 4x, and heat sources can be displayed on two different viewing settings: black hot and white hot.