$20.99 – Smart Tuya Zigbe WIFI Airbox CO2 Formaldehyde VOC Detector Temperature Humidity Sensor App Control Smart Home Scene Linkage Work with Amazon Google Assistant – Zigbee.
What is the best price for Smart Tuya Zigbee WIFI Airbox CO2 Formaldehyde VOC Detector? I think it is $20.99 (in Banggood). Just check coupons out (with price alert and history). You probably want to know what is the best price?
Latest coupon code price check (UTC time):
Banggood ($20.99)
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. I think you want to know if the price is good. It’s a good price, isn’t it? The average is $22.59.
Link: Banggood product page
Price: $20.99
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG977107
(you can check these old coupons out, but these probably won’t 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
Price history (for all/most countries) for Smart Tuya Zigbee WIFI Airbox CO2 Formaldehyde VOC Detector is here. The lowest price was: $19.99.
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)).