A smart nano-blackboard is also called a nano-blackboard all-in-one machine. It is generally divided into 65 inches, 75 inches, 85 inches, 86 inches, 98 inches, 100 inches, and 110 inches. Ordinary blackboards have a lot of dust, causing air pollution and endangering the health of teachers and students. Finger Touch Portable Interactive Whiteboard, Restaurant Video Menu Boards , Advertising Display Systems , Double Window Display ,Restaurant Menu Display Screen . We welcome new and old customers from all walks of life to contact us for future business relationships and achieving mutual success! The product will supply to all over the world, such as Europe, America, Australia,Botswana, Mombasa,Botswana, Sierra Leone.Using the kiosk ordering system, you can have the "four provinces" function