The worlds first large-size liquid Crystal Writing board！
1.can use any Hard object writing.
2.No dust pollution, no stimulation to the eyes.
3.Clearly visible over a long distance;
4.Button battery driven low power consumption;
The worlds first large-size liquid Crystal Writing board！
1.can use any Hard object writing.
2.No dust pollution, no stimulation to the eyes.
3.Clearly visible over a long distance;
4.Button battery driven low power consumption;