Smart nano blackboard is the integration of intelligence, multi-machine in one, integrated blackboard, touch all-in-one machine, audio, computer, projector in one, Digital Signage Outdoors, Digital Food Menu Boards , Wall Mounted Outdoor Digital Signage , Digital Drive Thru Menu Board ,Outdoor Commercial Display . For further information, please do not hesitate to contact us. All inquiries from you will be highly appreciated. The product will supply to all over the world, such as Europe, America, Australia,Bogota, Turin,Hamburg, Serbia.Save time three times. Save time for customers to queue up, and save time for merchants to order and cashier, so that merchants have more time to entertain more customers and increase restaurant revenue;