Just check coupons out (with price alert and history). Best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
F220 1.91 inch HD Screen Laser Therapy Blood Sugar Uirc Acid Lipid Monitoring Health bluetooth Call Multi-sport Modes Music Playback IP67 Waterproof Smart Watch – Black Steel
Banggood
Banggood warehouse is located in China. Only one coupon available!
Link: Banggood product page
1. ($27.99): BGf1ac44
coupon code has to be applied in shop’s 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
There were country-specific coupon codes published on Couponsfromchina social channels and price alerts. Coupon price may vary by country, because there’re different VAT rates, shipping cost etc. There is a chance that some latest coupons are still working:
1. (25.7.2024, $25.99): BGRJU7F220
Item: F220 Smart Watch
Countries: Greece, Portugal, Spain
Old coupons (from the oldest to the newest): BGNEWYEAR8, BGSPRING8OFF, BGHONEYSP
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Check out price history chart (for all/most countries) for F220 Smart Watch.
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)).