21inch lcd writing tablet with storage

{"cid":"91224020","title":"55 Inch Smart Interactive LED Touch Screen Electronic Whiteboard Multimedia Teaching and Conference Tablet for Elevator Use","imgUrl":"https:\/\/img.ismap.com\/nimg\/b1\/16\/aa59894917640845176133940f76-200x200-1.jpg","attrs":{"Brand Name":"YMY","Model Number":"YMY-6246S1-001","application":"Indoor","warranty":"1 year","Material":"Die Casting Aluminum, Aluminum Case+Tempered Glass Panel","Size":"Standard","color":"Black","Voltage":"100-240V","Dimensions":"1000x500","RAM":"16GB","Storage":"32GB","supplier type":"Original manufacturer","Control Method":"Remote Control, Remote Controller, WIFI, USB, Bluetooth, Wireless remote control","Touch Screen":"Touch","Mounting type":"Removable","Content Management System":"1","Remote Device Management":"1","Touch type":"Touch","Usage environment":"indoor","media available":"datasheet","Place of Origin":"Guangdong, China","use":"Elevator","function":"SDK","Pixels":"1.2mm","specification":"Kiosk, Touch Screen","Screen Type":"Touchscreen","brightness":"500cd\/m2","aspect ratio":"16:9","response time":"5ms","Pixel Density":"65536","Display Coating":"1","Operating Temperature":"-20 - 60 \u2103","Contrast Ratio":"1200:1","Color Depth":"16.7m","lifespan (hours)":"100000","ip rating":"Ip55","installation type":"Wall-mounted","resolution":"3840*2160","view angle\uff08h\/v\uff09":"178\/178","panel brand":"Boe, CSOT","Operation System":"Android 11","Display Function":"Text, Video\/Text\/Picture\/Time\/3D Text\/Office\/SWF","Usage":"Indoor HD","Product name":"smart screen","Keyword":"Waterproof LED Display Screen Panels","Certificate":"CE ROHS FCC CCC ISO9001","Screen Size":"32\"43\"47\"50\"55\"58\"65\"70\"84\""}}