Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
Charging Voltage: 5V, Model: T9, Maximum Working Time Of Batterty: 55minutes, Battery Capacity: 1100mAh, Charging Current: 2A, Time Of Single Operating Cycle: 20minutes, Storage Condition: Temperature -10-40°C / Humidity ≤85%, Product Dimension: 114*58*37mm, Output Power: 5W, Adjustable Temperature Range: 16°C-25°C, Protective Level: IP31, Charging Interface: Type-C, Working Temperature: 10°C-35°C, Net Weight: 90g
Aliexpress
I could not find it 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.
Link: Banggood product page
1. ($27.19): BG75597c
2. ($29.11): Cuponation9
you should apply the coupon in your cart 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): BG3b144d, BG1cbe1f, BGa7bc54, BG608d7e, BG7a3026, BG8309c7, BG7de009
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Price history (for all/most countries) for UREEl T9 Cold Compress Meter 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)).