Power supply USB 5V, CO2 detection range Temperature 5-35°C / 400-2000ppm, Detection range of HCOC Temperature 5-35°C / 0~9.999mg/m3, Temperature detection range -10~50°C, Item weight 74g / 2.6ounce, Connection mode Bluetooth4.0, TVOC detection range Temperature 5-35°C / 0~9.999mg/m3, Item size 75 * 75 * 50mm / 3.0 * 3.0 * 2.0in.
Get coupons, create price alert or check price history out! 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 coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($18.05): MVC8SPRING
2. ($18.44): BG00c906
put item in your cart and apply coupon code there 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): BGJAFR996, BGJAXIN996, BGAFF10OFF, BGJATD996, BGDEALJA996, BGFEFO996, BGMRDC31, 13f142, BGAPSE996, BGAPFO996, BGJUFO996, BG10OFFAFF1, 00c906, BGAlerabat1
(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 Smart USB Bluetooth Air Quality Monitor. The lowest price was: $7.99.
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)).