The night vision monocular good clear vision in the dark, and the screen resolution is excellent. It can be used in the daylight, with natural looking colors. The longest observation distance at night is more than 150 meters. Multi-purpose, can be handheld and headband use, Equipped with a j arm to connect to your helmet shroud. Could see clearly any objects in lens and appreciated the wide angle. Small size, light weight and easy to carry. Excellent quality night vision monocular, solid helmet mount. Beautiful appearance, package include: night vision monocular 1, J arm 1, bag 1. Clear imaging, day and night, color images in the daytime, black and white images in the night. The longest observation distance at night is more than 200 meters. Equipped with two kinds of brackets, multi-purpose, can be handheld and headband use. If you have any problems, anytime we will always be here to help you. Optical lens size: 22.5mm. Optical lens: IP66 waterproof and working temperature: -40 to +50? Blue Lens Cover: Night Vision Booster. Field of view: 25.5×14.5°. Eyepiece adjustment range: +2-5d. Low light observation distance: 200m/656ft/219yards. Darkness observation distance: 100m. Level Go: 1, 2, 3. Night working hours : 3 hours. Italian, Simple Chinese, Traditional Chinese, Russian, Japanese, English, French, Spanish, Portuguese and German.