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":"91199486","title":"4K Resolution 86 Inch Led Smart Board All In One Computer Interactive Flat Panel Display for Meeting and Teaching","imgUrl":"https:\/\/img.chinax.com\/nimg\/f0\/63\/6a43b1354d67624832e312d90437-200x200-1.jpg","attrs":{"Price":"900USD--1800USD","Brand Name":"iBoard or OEM","Model Number":"YL6-86","Minimum Order Quantity":"10","Delivery Time":"30 days","Certification":"CCC, CE, FCC, RoHS, Reach, OHSAS, ISO9001, ISO14001","Place of Origin":"Shenzhen, CHINA","Payment Terms":"T\/T, L\/C","Supply Ability":"10000 units per month","Packaging Details":"Carton Package","Installation":"Wall mounted, mobile stand (optional)","Warranty":"1 year","Operating System":"Android","Hdmi Out":"YES","Front Port":"Yes","Support":"Different system","Ports":"HDMI, USB, VGA","Folded":"No","Color":"Black and Silver","OPS":"One","Application":"Teaching, meeting, HOME, training, education","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","Power Supply":"AC 100-240V, 50\/60Hz","Operation System":"Andriod\/Windows\/Linux\/Mac.etc.","Accuracy":"2mm","Mobile Stand":"Optional","Colors":"Black Or OEM"}}

{"cid":"91220330","title":"4K 98 Inch Interactive Multi-Touch Screen WhiteBoard 16:9","imgUrl":"https:\/\/img.chinax.com\/nimg\/a0\/9f\/a55b25b2eb6ab241c0ad6b7526a4-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"MTHGH","Model Number":"XYC-98","Minimum Order Quantity":"1 Set","Delivery Time":"7-10 work days","Place of Origin":"China","Certification":"CE FCC ROHS ISO14001 ISO45001 ISO9001","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.","Size":"98 inch,55\/65\/75\/86\/110 inch Optional","Aspect Ratio":"16:9","Brightness":"450cd\/m2","Touch Points":"20 Touch Customized Options","Response Time":"5ms","Product Name":"Meeting Room Interactive Board, Meeting Room Touch All-In-One Machine, Sliding Touch All-In-One Machine","Technology":"Infrared","Connectivity":"USB, HDMI, VGA, Wi-Fi","Interface Type":"USB , VGA,DP","Voltage":"AC 100-240V 50\/60Hz"}}