$16.99 – Tuya WiFi Smart Carbon Monoxide Detector Alarm 85dB Sound Warning LCD Digital Display Home Indoor CO Poisoning Siren.
I have checked all old coupons and price is $16.99 for Tuya WiFi Smart Carbon Monoxide Detector (in Banggood). Basically copy coupon, view price history or create e-mail price alert. What is the best price?
Latest price update (UTC time):
Banggood ($16.99)
Banggood warehouse is located in China. Coupons for Tuya WiFi Smart Carbon Monoxide Detector? Nope, there’re no coupons in Banggood. Isn’t it too expensive? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal $15.89)
Link: Banggood product page
Price: $16.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): BG662cb9
(these codes were not working in latest coupon update, but you can check them out anyway)
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 Carbon Monoxide Detector. The lowest price was: $9.99.
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)).