LED indicator: Blue, Connection: Wi-Fi 2.4GHz, IR Remote Control Distance: ≤10m, Infrared Frequency: 38KHz, Temperature Accuracy: ±1℃, Humidity Accuracy: ±5%RH, Temperature Measure Range: 0℃~60℃, Input: DC 5V/1A(Micro USB NO Adapter), App: Tuya Smart or Smart Life, Size: 65mmx 65mmx 17mm, Humidity Measure Range: 0%RH~99%RH.
Basically copy coupon, view price history or create e-mail price alert. What is the 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 and price update (UTC):
Banggood
Banggood warehouse is located in Europe 
. There’s only 1 record in my database, so I have no idea if the price is OK.
Link: Banggood product page
1. ($21.83): Cuponation9
2. ($22.07): BG8ReviTrage
coupon code has to be applied in shop’s 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): BGSmart6, pROMo8cuPoN, BGJUNEGSG9, 9OFFSUMMER
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Not enough data to show price history chart… $20.39 is the only recorded price. It was not cheaper than that since we have saved it in DB.
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)).