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?
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
Aliexpress
There’re some similar (or not) items on Aliexpress
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 
. I don’t really know if this price is reasonable, coz there’s no price history in my DB.
Link: Banggood product page
1. ($21.83): Cuponation9
2. ($22.07): BG8ReviTrage
paste coupon code in your cart and click Apply after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGSmart6, pROMo8cuPoN, BGJUNEGSG9, 9OFFSUMMER
(there’s a little possibility that old coupon will work)
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)).