Basically copy coupon, view price history or create e-mail price alert. What is the best price?
Blood Oxygen / Sleep / Heart Rate Monitor Information Push
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. There is one coupon right now! Check this out.
Link: Banggood product page
1. ($34.19): BGWRIBAND10
put item in your cart and apply coupon code there 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): 28q8, 17Q8, 502C6B, e2bcea, band10, newwear10, BGQ8ST, AFfbG10, BG13Q8, BGBFAFF2019, BGNANWQ8, BGNWQ8, BGNEQ8, BGVDay10%off, BGband10, BGAFF10OFF, bgshOOp10, BG11SHOP, BGCuponation10
(probably won’t work, but you can try them out)
Price history and price alert
Do you need price history chart (for all/most countries) for NEWWEAR Q8 Smartwatch? There we go.
Price records source(s): Gearbest, 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)).