usb2 0 3 0 smart digital blackboard

{"cid":"91220330","title":"65 Inch 4K Smart Digital BlackBoard With 4GB RAM 64GB Storage USB2.0\/3.0 Interface","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/ae\/2e\/497d2bf5ee3cd4033c36e7c8617c-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"MTHGH","Model Number":"XYC-65","Minimum Order Quantity":"1 Set","Delivery Time":"7-10 work days","Place of Origin":"China","Certification":"CE FCC","Payment Terms":"L\/C, T\/T, Western Union","Supply Ability":"10000 Set","Packaging Details":"Standard carton package : carton+ plastic bag+ foam+ honeycomb paperboard+ pack thread.","Product Name":"65\" Intelligent Black Board","Resolution":"3840*2160@60Hz","Screen Size":"65 Inch","Brightness":"350cd\/m2","Smart Blackboard Size":"65 Inch 4K Flat Writing Panel","Interface":"USB2.0\/3.0","Storage":"64GB","Ram":"4GB","Contrast Ratio":"1200:1","Touch Technology":"Nano Film","Chalk Writing":"Support","Dual System":"Support","Multi User Support":"Yes","Application":"School Teaching, Meeting"}}