Check coupons or create price alert down below. You probably want to know what is the best price?
Color White, Net Weight 129g, Model ClearGrass Thermometer Hygrometer Barometric, Sticker Size Sticker Diameter: 28.36mm / 1.16″, Air pressure Measuring Range 30 ~ 125kPa (± 0.05kPa), Charging Port USB-C, Rated Input 5V — 1A, Product Size 77.21x 77.21x 27.8mm / 3.04″x 3.04″x 1.09, Battery 3350mAh Lithium Battery (Built in), Thickness: 0.21″, Humidity Measuring Rang 0 ~ 99.9% (± 2%), Shell Material 94-V0 Flame-retardant Material, Temperature Measuring Range -20 ~ 50℃ (± 0.2℃), Hook Diameter: 0.34″, Screen Szie 61.21x 48.72mm / 2.41″x 1.92″
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 China. There is one coupon right now! Check this out.
Link: Banggood product page
1. ($52.46): BG10OFFAFF1
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): AFfbG10, BGBFAFF2019, BGCITYADS2019, BGHOMEG12, bGhOnEy10, BGdragonBoat, BGSS10%SW, bgshOOp10, BGHome15%, BGHOMEA15%, BgcLuBofErtA10, 7d18f7, BGAFF10OFF, BGCuponation10, 13f142, BGHONEY2110, BG10OFFAFF, BGwhielabel
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Price history and price alert
Price history (for all/most countries) for Qingping ClearGrass WIFI Thermometer Hygrometer Barometer is here.
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)).