... 138/42 118/36Focus range,yards1.5 to infinity 1.0 to infinity 1.0 to infinityEye relief distance,mm15Dioper setting,D+4 ... .5V)Estimated battery life without IR,hourUp to 70Operating temperature,-30°to+45°Storage temperature,0°to+60°Water instrusionMeet IPX4 ratingHumidity,%Up ...