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. Touch Screen Ordering, External Digital Advertising Screens , Window Lcd Display , Lcd Display Advertising Monitor ,Advertising Digital Signage Display . "Quality 1st, Rate least expensive, Provider best" is definitely the spirit of our company. We sincerely welcome you to go to our business and negotiate mutual small business! The product will supply to all over the world, such as Europe, America, Australia,Bulgaria, Hungary,Sweden, Washington.Using the kiosk ordering system, you can have the "four provinces" function