, 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.
Just check coupons out (with price alert and history). Let’s see what best price is ATM.
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
Air Monitor Touch IPS Screen Air Quality PM2.5 Detector Hygrometer Thermometer Home CO2 Meter Monitor Tester | $278.10 | – |
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($67.99): BGTYOJ758
2. ($78.99): BGTYOT758
apply code in your basket (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
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for ClearGrass Air Quality Monitor. 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)).