$19.99 – Tuya WiFi Smart Temperature Humidity Sensor Indoor Thermometer Hygrometer Meter with LCD Display Screen Detector APP Remote Monitoring Support Alexa Google Home.
Tuya WiFi Smart Temperature Humidity Sensor is for $19.99 (in Banggood). Go down and check coupons out. Remember to check price history if it is available. Do you want to know what the best price is?
Latest price update (UTC time):
Banggood ($19.99)
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. Well, is it a good price anyway? Hmmm, price is higher than average (which is $18.83 right now), so better set price alert down below…
Link: Banggood product page
Price: $19.99
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG1bba93
(I don’t think these’re gonna work, but you can try ’em 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
Check out price history chart (for all/most countries) for Tuya WiFi Smart Temperature Humidity Sensor. The lowest price was: $18.49.
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)).