Using time: About 7 days, Charging Type: Magnetic charging, APP Name YFit, Size: 1.4 inch, Bluetooth Version BT 4.2, Model GTO, Standby Time: About 15 days, 24h Heart Rate Monitor Support, Operating Mode Single Touch, Battery Capacity: 170mAh, Resolution: 320*320, Waterproof IP68, Compatible OS Android 5.1 or above, Charging Time: About 2 hours, iOS 9.0 or above, Type: IPS.
Basically copy coupon, view price history or create e-mail price alert. What is the best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. As you can see I didn’t find any active coupon for this product right now…
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGKPGTO, BGGTO23, bgshOOp10, band10, BGCuponation10, BGWRIBAND10, BGbf11dd, BG284c49
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for Kospet GTO IML Fitness Tracker. The lowest price was: $16.2.
Price records source(s): 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)).