Night vision binocular 1X20, high quality low light tube, high quality optical ... /52Field of view,deg1812.5Focus range,m1.5 to infinity1.0 to infinityExit pupil diameter,mm6Eyepiece Dioper adjustment,dptr+4,-4Eye ... of water-resistenceIPX4Humidity,%93Operating temperature,-30°to+45°Storage temperature,0°to+60° Night vision 1X20