Sosu nano smart blackboard 4K high-definition display, A+ LCD panel with brilliant colors, high-contrast high-brightness display resolution that can support up to 4KUHD, high-light filtering technology, filters out 85% of the light source that is harmful to the eyes, making the picture softer. Interactive Board For Online Teaching, Wifi Advertising Screen , Commercial Display Monitors , Floor Standing Display Board ,Window Lcd Display . We sincerely welcome domestic and foreign merchants who calls, letters asking, or to plants to negotiate, we will offer you quality products and the most enthusiastic service,We look forward to your visit and your cooperation. The product will supply to all over the world, such as Europe, America, Australia,Czech, Iraq,Kuala Lumpur, Albania.Using the kiosk ordering system, you can have the "four provinces" function