[Unpacking experience]  
The YBPOO anti myopia intelligent pen is packaged with environment-friendly kraft paper. On the small front package, there is only the logo of the YBPOO anti myopia intelligent pen, which is clean and simple. The tips on the back mainly describe the main configuration parameters and official website information of YBPOO anti myopia intelligent pen. It includes information such as model, weight, standby time and service time. This information can tell consumers what kind of products you will get.  
 
After the package is opened, the YBPOO anti myopia smart pen is embedded in the middle. The YBPOO anti myopia smart pen is made of polycarbonate, which has good impact resistance, thermal distortion resistance, good weather resistance and high hardness. This kind of material selection is quite necessary for active children. Many things of children are not damaged, but broken.  
 
Two boxes of 2B automatic pencil lead and two automatic pencil cases are the same size as ballpoint pens. However, after finishing writing the automatic pencil book, you need to manually push the tip of the pen, and the refill will automatically move forward a bit, which is different from the ordinary automatic pencil. It's just that the top is replaced by the bottom, which is also easy to use, but I'm not used to it at the beginning.  
 
What's the secret of YBPOO anti myopia intelligent pen? You can see from the following figure. There are grooves on both sides of the pen tip, which is the characteristic design of adjusting the pen holding position incorrectly. I have a deep understanding of this. The baby at home always writes with two fingers folded together, and there is no way to adjust it. When using the YBPOO anti myopia intelligent pen, the thumb and index finger will be placed in the grooves on both sides respectively, and when the pen holding position is correct, When the light is sufficient, the pen tip will stretch out by itself, which will achieve the purpose of adjusting the pen holding posture. The prompt light will be blue and red. When the stage mode you select meets the requirements, it will be blue. When a certain item fails to meet the requirements, such as the light is too dark and the pen is held incorrectly, there will be a corresponding red light and voice reminder. There are also corresponding modes on the display screen. You can also see intuitively what mode you are in and what is wrong with you. The top is the switch and setting key. Parents must use the long pen cap mode to make settings.  

There is only one interface on the top of the YBPOO anti myopia smart pen, which is the micro USB charging interface. Normally, I use the 5V1A adapter to charge. It can be charged in about three hours. The red light will be on during charging, and will go out when it is fully charged; The duration of my test is about 6 hours. The sound is fully turned on and the results are obtained during the first phase of the test. However, I personally think the sound prompt is a little small during the use process.  
 
It is also quite simple to install and take out the small pen cap, as long as you adjust the direction and gently press it during installation.  
 
Finally, I haven't been successful in the test. It is said in the instruction manual that the refill will automatically stretch out as long as it is kept straight for a few seconds. However, I used another method to change the refill, that is, use the correct position to hold the pen. At this time, the refill is stretched out, and then directly unscrew the pen head. At this time, the refill can be directly replaced.  
 
YBPOO anti myopia smart pen is equipped with two different refills as standard. In terms of versatility, automatic pencils are better, and chips can be bought in convenience stores everywhere. The ball point pen refill may not be easy to buy in ordinary convenience stores, but it is available on the official website.