teaching board with 1200 1 contrast ratio

{"cid":"91217804","title":"High Contrast Ratio Interactive Teaching Board with 178\u00b0 Viewing Angle and 1200 1 Contrast Ratio","imgUrl":"https:\/\/img.chinax.com\/nimg\/4b\/ec\/0f3a0bf78d0346c7ca787e91c07e-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"TSINGHILL","Model Number":"T55","Minimum Order Quantity":"5 Unit","Delivery Time":"5-30 days","Place of Origin":"Guangdong, China","Certification":"CE, CNAS, FCC, CCC","Packaging Details":"Honeycomb Box","Payment Terms":"TT\/West Union","Supply Ability":"50,000 units per month","Software":"All Windows Software Can Be Used ","Contrast Ratio":"1200:1","Color":"Black Or OEM","Connectivity":"Wi-Fi, Bluetooth, Etc.","Inputs":"VGA, HDMI, USB, Etc.","Brightness":"350cd\/\u33a1","Resolution":"1920*1080","Product Name":"Interactive Digital Blackboard"}}

{"cid":"91225197","title":"Silver Gray 75 Inch Smart Multimedia All-In-One Conference Teaching Machine New Model Infrared Touch Interactive Board for","imgUrl":"https:\/\/img.chinax.com\/nimg\/59\/a6\/90db2a85f4ff3bcbfac741087747-200x200-1.jpg","attrs":{"Brand Name":"Sight","Model Number":"XD-A001","Minimum Order Quantity":"1","Panel Style":"Lcd","warranty":"1 year","whiteboard type":"Interactive whiteboard","Place of Origin":"Guangdong, China","Application":"Conference, Office, Education","aspect ratio":"16:9","color":"Black","Contrast Ratio":"1200:1","folded":"No","Frame Material":"Aluminum","Height":"100","Input Type":"Hd mi","Installation":"Wall mount","Maximum Resolution":"3840 X 2160","Orientation":"Horizontal","Overall depth":"10","package dimensions":"160x100x20cm","product dimension":"1488X897X88 mm","Recommended use":"Office","Screen Refresh Rate":"60hz","Target Audience":"Student","Weight":"68kg","Width":"150","Writing method":"Pen\/finger touch"}}

{"cid":"91220330","title":"110 Inch Interactive Touch WhiteBoard 350cd\/M2 Brightness Sliding All-In-One Machine","imgUrl":"https:\/\/img.chinax.com\/nimg\/e5\/38\/db99a779c7d8e070b27cc4ffc028-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"IKAR","Model Number":"XYC-110","Minimum Order Quantity":"3","Delivery Time":"5-8 work days","Size":"110 Inch","Brightness":"350cd\/m2","Product Name":"Meeting Room Interactive Board, Meeting Room Touch All-In-One Machine, Sliding Touch All-In-One Machine","Connectivity":"USB, HDMI, VGA, Wi-Fi","Warranty":"1 Year","Interface Type":"USB , VGA,DP","Voltage":"AC 100-240V 50\/60Hz","Compatibility":"Windows+Android,Dual System","Place of Origin":"China","Certification":"CE FCC ROHS Google EDLA","Payment Terms":"L\/C, T\/T, Western Union","Supply Ability":"3,000 units per month","Packaging Details":"cardboard box + wooden frame."}}