1Remove the objective lens cover, in the observation (photograph) state, aim the objective lens at the scene to be observed, and watch the display screen from the center of the eye. 2Adjust the diopter handwheel to adjust the screen to be the most clear. 3Adjust the objective lens focusing handwheel to make the observed scene the clearest. The machine will automatically fine?tune the brightness of the display screen according to the average brightness of the scene in the center of the screen. Electronic zoom can be realized by pressing the upper and lower buttons, and the electronic image magnification range is 1?8 times. 4When the ambient light is relatively bright, no auxiliary lighting source is needed (turn off the auxiliary lighting source to save battery power). When the ambient light is very dark and the observation of the scene is not clear, please turn on the auxiliary lighting source and adjust the brightness of the light source to make the observation clear. 5In the state of observation (photograph, video), press the "Screen Brightness\Auxiliary Lighting" button to enter the screen brightness adjustment function menu, the screen, the number after the word "Bright" appears indicates the current screen brightness. Press the up and down keys, the screen brightness varies between values 1?9; value 9 is the brightest.