$37.99 – ET481 1.43 inch AMOLED HD Screen ECG Blood Composition Non-invasive Blood Glucose Measurement HRV Function AI Medical Diagnosis Metto SOS Emergency Call Heart Rate Blood Pressure SpO2 Monitor Sleep Monitoring Multi-sport Modes IP68 Waterproof Smart Watch – Black.
I have checked all old coupons and price is $37.99 for ET481 1.43 inch AMOLED Smart Watch (in Banggood). You can create price alert here, copy coupons and view price history. Best price?
Latest coupon code price check (UTC time):
Banggood ($37.99)
Banggood warehouse is located in China. There are no coupons for this product in Banggood. Good or bad price? From what I can see this price is higher than average price ($37.66).
Link: Banggood product page
Price: $37.99
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG07b7a3
(I don’t think these’re gonna work, but you can try ’em out anyway)
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.
Price history and price alert
Do you need price history chart (for all/most countries) for ET481 1.43 inch AMOLED Smart Watch? There we go. The lowest price was: $33.99.
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)).