Basically copy coupon, view price history or create e-mail price alert. Best price?
5 ATM, Waterproof, Multifunctional, Built-in Bluetooth
Aliexpress
There’re some similar (or not) items 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 available! Pretty cool, huh?
Link: Banggood product page
1. ($17.99): AFfbG10
put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): 502C6B, e2bcea, zeblaze10, band10, TTxBG10, BG3CSUM, BGBFAFF2019, BGb57e67
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – Zeblaze VIBE LITE Smart Watch ($-3)
Price history and price alert
Here is price history (for all/most countries) for Zeblaze VIBE LITE Smartwatch White.
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)).