Mainri Note by Chris HuangIntroducing the new wave of predictions it solves the problems of writing devices! The problems associated with existing devices include: 1. Difficulty in hiding the device: You need to place the device on your hand or on the notebook. 2. Unclear writing: Generally, the writing is not clear. Further, the handwriting of the most hidden writing devices is more like a pencil. It is not dark enough. As a result, you cannot perform the effect on stage.