Feature:1. Adjust the intensity of the red dot: The red dot brightness setting ensures optimal visibility in any lighting conditions, allowing the shooter to adjust the intensity of the red dot depending on the situation. 2. Accurate aiming: The red dot sight can achieve more accurate aiming with both eyes open. Free relaxation of the eyes helps to quickly achieve goals. 3. Visible markings: Regardless of lighting or surroundings, the markings are visible in the light, allowing for a clear view of the scene. 4. All metal construction: The 1x40RD red dot sight is made entirely of metal construction, which is shockproof, waterproof and anti-fog. 5. . . Product Material: Metal Weight: approx. 215 g / 7,6 oz Battery Type: Button Cell (Supplied with Built-in Battery) Battery model: CR2032 Battery capacity: 200 mAh . . Package List:1 x Monokular 1 x Hex Wrench 1 x do wipe cloth 1 x Manual . .