Intensifier Tube 3rd Gen. Select AlphaMagnification 1XResolution 64-72lp/mmSignal to noise ratio 20-28Photocathode Sensitivity 1900-2600Detection range 325 M/YRecognition range 275 M/YLens system F1:1.2, F...MMFOV 40 deg.Diopter adjustment +2/-6Power supply Two 1.5 Volt AA sizeRange of focus 0.25M to infinityControls DigitalBattery life 50 hoursDimensions 113 x 56 x 50 MMWeight 1.38 lbs / 392 gCamera adaptable YesWaterproof 1M for 30 minOperation temperature -40 +50°CStorage temperature -50 +70°C