, Temperature 0 ° C ~ 50 ° C, Battery pack Lithium 2000mAh / 3.7V, CO2 400 ~ 99999ppm, Humidity 0 ~ 99%, Wireless connection WiFi 2.4 GHz, Bluetooth 5.0, PM2.5 / PM10 0 ~ 500ug / M and sup3, Weight 143g, Area 63.6 * 46 * 54.6 mm, 1A, Product Air Quality Monitor, 59.9 * 49.9 mm, Screen Grease in one color, Brand ClearGrass (Xiaomi Cooperation Brand), Energy input 5V.
Basically copy coupon, view price history or create e-mail price alert. What is best price?
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.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($67.99): BGTYOJ758
2. ($78.99): BGTYOT758
this code has to be applied in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGXINPI758, BgcLuBofErtA10, BGDEFR758, BGDETD758, BGAFF10OFF, BGCuponation10, BGMATH758, BGMAFO758, 13f142, BGHONEY2110, BGMAYTD758, BGQP758, BGISF758, BGTYOC758, BGISOD758, BGTYOD758, BGTYGQ758, BANGGOODSD
(there’s a little possibility that old coupon will work)
Price history and price alert
Do you need price history chart (for all/most countries) for ClearGrass Air Quality Monitor? There we go. The lowest price was: $67.99.
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)).