1. Display effect 80 inches, 800*600 active matrix color. 2. Equipped with 21MM eyepiece and a custom hood. 3. Adjustable diopter and brightness adjustment. 4. External JST socket 3.7V battery, convenient and fast. 5. CVBS signal input, support NTSC / PAL. 6. Metal case with internal fixing bracket, waterproof, dustproof and shockproof. 7. The humanized strap is comfortable and convenient, and supports up and down adjustment. 8. The 0.39-inch OLED panel module uses a single crystal silicon transistor. The panel is panel driven and logic driven for small size, light weight and high definition.