Aliexpress
Click here… to search for KINGWEAR KW35 Fitness Tracker on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (46.72 USD): BGc70579
Coupon (46.72 USD): BGbf11dd
(CouponsFromChina.com tip: apply it in your cart 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): band10, bgshOOp10, BGHALLOWEEN, BG11SHOP, BGCuponation10, BGWRIBAND10, 6GSGIT, BG51f436
(these coupons are old, so probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for KINGWEAR KW35 Fitness Tracker.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).