Model : MG550+ IIT : ORPHA 66GK+ Gen 3R Resolution : 65-75 lp/mm Photocathode type : S25 S/N : 23-28dB Luminous sensitivity : 700-900μA/lm MTTF : 10,000hrs Magnification : 4x len : 50mm FOV : 15° Detection distance : 450m Diopter (deg) : +5/-5 Lens system : F1.5, 66mm Range of focus : 8m--∞ Dimensions : 176x73x54mm Weight : 591g Power supply : 2.0-4.2V Battery type : CR123A / 3V Battery life : 80(w/o IR) / 40(w IR) Operating temperature : -40/+60 ℃ORPHA OPTICS TECHNOL CO.,LTD.