how to make led writing board

{"cid":"91199486","title":"86'' Intelligent Smart Recordable Blackboard Green Board 4000:1 LED Android 9.0 350cd\/m2 Interconnection Blackboard","imgUrl":"https:\/\/img.ismap.com\/nimg\/24\/f2\/9ea8c516a7669cedd5cc23480618-200x200-1.jpg","attrs":{"Price":"1800USD-2500USD","Brand Name":"iBoard or OEM","Model Number":"TE-GR-86","Minimum Order Quantity":"10","Delivery Time":"30 days","Certification":"CCC, CE, FCC, RoHS, Reach, OHSAS, ISO9001, ISO14001","Place of Origin":"Shenzhen, CHINA","Packaging Details":"Carton Package","Payment Terms":"T\/T, L\/C","Supply Ability":"10000 units per month","LCD type":"DLED","Physical resolution of LCD":"3840*2160","Brightness":"350 cd\/\u33a1","contrast ratio":"4000:1","Display area":"1895.04*1065.96mm(85.6 inch)","Screen scale":"16:9","viewing angle":"178\u00b0","Video format":"PAL\u3001NTSC\u3001SECAM","Board Color":"Green\/black optional","Screen size":"75''\/86'' optional(custom available)","Logo":"OEM available","Application":"Meeting room\/Classroom","Aspect Radio":"16:10, 16:9...","Interface":"USB, VGA, RS232, HDMI","Screen Size":"65\",75\",86\", 98\"","Multi-Touch":"Up to 40 points","Hotkeys":"Two sides hotkeys","Shipping Way":"Sea Shipping Air Freight Truck Freight","Touch Points":"20 points","Warranty":"1 year","Power Supply":"AC 100-240V, 50\/60Hz","Operation System":"Andriod\/Windows\/Linux\/Mac.etc.","Accuracy":"2mm","Mobile Stand":"Optional","Colors":"Black Or OEM"}}

{"cid":"91209940","title":"4K UHD Electronic White Smart Interactive Board For Classroom 3840x2160","imgUrl":"https:\/\/img.ismap.com\/nimg\/34\/94\/a675663ab633184c63cbf1ef1def-200x200-1.jpg","attrs":{"Price":"USD 678~688\/sets","Brand Name":"Auveeya","Model Number":"X6","Minimum Order Quantity":"1 Set","Delivery Time":"1~20 days (According to quantity)","Certification":"CE,FCC,ROTHS,ISO","Place of Origin":"Guangdong, China","Payment Terms":"T\/T, Payoneer, L\/C, Western Union,","Supply Ability":"3000 Sets per Month","Packaging Details":"Carton, Wooden pallet, Wooden case","Product name":"Smart interactive board","Size":"65 inch (75, 86 optional)","Android version":"Android 9.0 (3+32GB)","Resolution":"3840*2160","Touch points":"20 touches","Technology":"Infrared touch","Aspect ratio":"16:9","Application":"teaching, training","Warranty":"One year"}}

{"cid":"91214285","title":"Board Line Fine Line Whiteboard Marker Pens Durable Multipurpose SGS","imgUrl":"https:\/\/img.ismap.com\/nimg\/df\/b1\/f0a5e6d8edd47ce2b5f9aa48f0d4-200x200-1.jpg","attrs":{"Price":"USD 0.1-0.5 \/ pieces","Brand Name":"UCI","Model Number":"dry erase marker","Minimum Order Quantity":"1000 pieces","Delivery Time":"1-2 month by ship","Certification":"SGS","Place of Origin":"China","Payment Terms":"Western Union, T\/T","Supply Ability":"100000 pieces per month","Packaging Details":"Carton box","Material":"plastic","Color":"black,custom","Size":"standard size,custom","Package":"paper box,custom","Logo":"custom","Application":"office,school,home","Feature":"easy to write","Sample time":"3-7 working days"}}