$104.99 – Tuya WIFI Smart CO2 Meter TVOC PM2.5 PM1.0 Temperature and Humidity Infrared Sensor Air Quality Monitor – With EU smart socket.
You can get Tuya WIFI Smart CO2 Meter TVOC PM2.5 PM1.0 for $104.99 with coupon (from Banggood). Go down and check coupons out. Remember to check price history if it is available. What is the best price?
Latest coupon code price check (UTC time):
Banggood ($104.99)
Banggood warehouse is located in China. So I have checked for active coupons (all category coupons and old ones), but there was no working coupon in Banggood. You probably want to know if this is a good price. IMHO this is a good price, coz it’s lower than average ($106.09)
Link: Banggood product page
Price: $104.99
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG20236Tool, BG183b9c, BGTOOS729, BGBFDAY8, BGALL8, BGMAI666
(there’s a little possibility that old coupon will work)
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Here is price history (for all/most countries) for Tuya WIFI Smart CO2 Meter TVOC PM2.5 PM1.0. The lowest price was: $99.99.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).