1. No bright light, no radiation, no blue light, continuously escorting children's eyes
2. Sensitive pressure sensing, control thickness as you like
3. One-click erase, no eraser needed
4. Built-in button battery, if cleared 100 times a day, a button battery can be used for 365 days
5. Anti-deleting lock key design to keep the baby's wonderful works
6. Size: 30x18 cm
7. Weight: about 137 g