Basically copy coupon, view price history or create e-mail price alert. Do you want to know what the best price is?
pedometer and sleeping monitor., it consumes less power and can generally standby for 10 – 30 days., Waterproof Design: IP68 waterproof standard
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. You can get coupon down below.
Link: Banggood product page
1. ($14.54): band10
apply it 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): e2bcea, TTxBG10, 2019SPEDM, BG3CSUM
(these coupons are old, so probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for MGCOOL Band 3 Smartband.
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)).