Night Vision Monocular Goggle Head Mounted 850nm Infrared Hunting Telescope for Helmet 1.54 Inch HD Screen. It can be watched at night, help you achieve clear display in totaly dark environment within 500M. It featured with excellent optical clarity, fully-coated objective lens, Do not support manual zoom 7X lens magnification to offer you more full field. The 7X magnification adjustment allows you to watch animals/plants clearly within 500M in totaly darkness. This night vision goggles is supplied with an adjustable headband as standard, making it easy to go handsfree. (Headband included in the package). OL Display: 1.54 Inch. Starlight Sensor: CMOS 307. Infrared Wavelength: Default 850nm. Video Synchronous Delay. Visible Distance Under Totally Darkness: Effective Distance: 200-300M, Visible Distance: 500M. Memory Card: Doesn’t Support. 1 Night Vision Monocular.