How to Choose an EMF Protection Shield

How to Choose an EMF Protection Shield
Error
PayloadTooLargeError: request entity too large
   at readStream (/root/rankerxmobiledoc/node_modules/raw-body/index.js:155:17)
   at getRawBody (/root/rankerxmobiledoc/node_modules/raw-body/index.js:108:12)
   at read (/root/rankerxmobiledoc/node_modules/body-parser/lib/read.js:77:3)
   at textParser (/root/rankerxmobiledoc/node_modules/body-parser/lib/types/text.js:86:5)
   at Layer.handle [as handle_request] (/root/rankerxmobiledoc/node_modules/express/lib/router/layer.js:95:5)
   at trim_prefix (/root/rankerxmobiledoc/node_modules/express/lib/router/index.js:317:13)
   at /root/rankerxmobiledoc/node_modules/express/lib/router/index.js:284:7
   at Function.process_params (/root/rankerxmobiledoc/node_modules/express/lib/router/index.js:335:12)
   at next (/root/rankerxmobiledoc/node_modules/express/lib/router/index.js:275:10)
   at expressInit (/root/rankerxmobiledoc/node_modules/express/lib/middleware/init.js:40:5)