Helmet bracket or Helmet. Dual-screen binocular glasses naked-eye 3D display technology restores the real three-dimensional scene seen by the human eye (the patent for naked-eye 3D night vision devices has been authorized in various countries). Built-in 1.4-inch 390390 dual screen, display 7-level brightness adjustment. Fully independent binocular technology, can independently adjust the left and right eye vision compensation (refractive adjustment range +/-3.5, both myopia, farsightedness 350 adjustment compensation), 7 times magnification. 250m300m full black observation distance, 1minfinity low light observation distance. Built-in 2600MAH lithium battery. High-power infrared light, 7-speed infrared light brightness adjustment. 4 color effects: color, black and white, moonlight green, Film Mode. Adjustable interpupillary distance, 6072mm. Photo Resolution:36MP? 12MP? 8MP? 5MP? 3MP? 2MP? 1MP. Sensor: 2.0MP Starlight sensor. Display Screen: Inner screen is 1.4 inch 390 390 HD TFT, 7-level brightness adjustment, free switching between single and double screens, 7X magnification. Eyepiece: Fully independent binocular technology, can independently adjust the vision compensation of left and right eyes (refractive adjustment range +/-3.5, both myopia, farsightedness 350 adjustment compensation). IR LED: 3W, 850nm strong infrared spotlight, 7 grades infrared adjustment. Lens: F1.0 larger aperture, f=25mm, FOV 10°. Auto off:1 min/3 min/ 5 min/ 10 min/ OFF. View Distance In Complete Darkness:About 250-300 meters, 3 meters~infinity. Digital Zoom:Digital Zoom 8X. Storage Media: Support 32G TF. Power Source: 3.7V, 2600MAH lithium battery. Operation Temperature: -20? To +50? Storage Temperature: -30? To +60? Dimensions & Weight: approx. It usually takes around 3 to 4 weeks to United Stated, United Kingdom, Australia, Canada and some European countries. But for other countries, it may need 5-7 weeks to deliver the parcel. All items will be tested or checked carefully and packaged in good condition before sending out to you. Some faulty items might happen especially after overseas transportation. We promise we will provide prompt and satisfactory solution to you. Your 100 satisfaction is our greatest goal here. Friendly communication is always appreciated and welcome. Sometimes it might get filtered as a spam or our office is closed for weekends and public holidays.