Effectively overcome the hidden danger of "blue light" damage to students' eye vision, and protect the visual health of teachers and students.Choose green enamel panel, surface hardness up to ≧ Mohs 6.5, anti-glare, anti-reflection, no bright spot at any Angle. Waterproof and dust-proof, support writing, support writing, can be written with chalk, water-based pen, dry and wet wipe, or water, alcohol wet wipe, repeated erase without residue. In addition to the hard object impact, the use of the board under normal conditions will not be damaged, do not require maintenance, durable.Effectively overcome the hidden danger of "blue light" damage to students' eye vision, and protect the visual health of teachers and students.