The CRONUS ATS 400x300 Thermal Monocular delivers advanced thermal imaging technology with variable 2.6x to 10.4x magnification and 400x300 resolution for superior heat detection and targeting.CRONUS ATS 400x300 Thermal Monocular400 x 300 thermal imaging resolutionVariable magnification: 2.6x - 10.4x9-hour battery life with 18650 external power supply7.5deg field of view for optimal scanningCompact design: 5.9" x 1.8" x 3.0" weighs 12.3 ozOperates in extreme temperatures: -22degF to 122degF0.5" eye relief for comfortable viewingPerfect for hunting wildlife observation security applications and outdoor activities requiring thermal detection capabilities in any weather conditions.