Bought an Air quality monitor
8-in-1 WiFi Air Quality Monitor, with Large LED Screen (Size: 11.8 in*7.5 in*1.2 in), Detects CO2, PM2.5, PM10, HCHO, TVOC, Temperature and Humidity, Indoor CO2 Monitor with Time and Alarm
price was $91 US ( free shipping to NZ )
this model also come with Modbus RS485 output which will interface with my Ecowitt WN90LP unit
Display screen is impressive (can be seen from any position any angle etc )
https://eu.inkbird.com/products/wi-fi-air-monitor-iaqm-128w