LCD is very poor. Its difficult to see what you write. Thats why there is no writing seen in the video. At firs i thought it is because of battery and i fully charged but nothing change. i would be better if there was a backlight. I am sending a photo. I wrote some thing on lcd.
If Lcd is not ok then it is very expensive calculator.
Works ok. Writing pad not very bright. Manual only in Chinese. Fast shipment.