Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. I found coupon for you. Check this out.
Link: Banggood product page
Coupon (54.41 USD): BGc70579
(CouponsFromChina.com tip: 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
Old coupons (from the oldest to the newest): BGHALLOWEEN, band10, BG11SHOP, BGCuponation10, BGWRIBAND10, 6GSGIT, BG51f436
(there’s a little possibility that old coupon will work)
Price history and price alert
Here is price history (for all/most countries) for KINGWEAR KW10 Pro Female Smart Watch.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).