Specification: Name: Monocular Telescope Material: aluminium alloy. Size: approx. 12.7 x 4.4 x 4.4 cm/5.00 x 1.73 x 1.73 inches. Parameters: Magnification: 8-24X Lens diameter: approx. 30 mm. Eyepiece diameter: approx. 15 mm. The field of view angle: about 2.6 degrees - 4.6 degrees. Field of view: approx. 45.5 - 80.5 m/10001.33 - 3169.29 inches/1000 m/39370.08 inches. Exit pupil diameter: approx. 1.2 - 1.7 mm/0.05 - 0.07 inches. Exit pupil di: approx. 14-47 mm/0.55-1.85 inches. The next focal length: approx. 3 m. Teles : BAK4. Lens coating: full width green film Focusing : central rotating focus Support: Tripod Contents: 1 x monocular telescope. 1 x carry bag. 1 x tripod. 1 x mobile phone connection stand. Notes: Instructions for use: 1. Remove the eyepiece cover and lens cover. Check the lens. If there is any dirt, clean it with a professional lens cloth. 2. It is recommended to choose 8-10 times for the first use of the telescope and then try to use the higher magnification after you have become familiar with it later. 3. Myopia people can use it directly, no myopia people need to turn up the blindfold to watch. 4. After selecting the observation target, turn the objective lens focusing wheel counterclockwise during observation and slowly adjust the definition until it is clear. The l scale in the middle is convenient for you to focus quickly next time.