Basically copy coupon, view price history or create e-mail price alert. Do you want to know what the best price is?
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 and price update (UTC):
Type: IPS HD Color Touch Screen, APP Name Glory Fit, Color Black / Gold / Silver, bluetooth Version BT V5.0, Compatible OS Android 4.4 / iOS 9.0 and above system, Model GTS Pro, Resolution: 240*295 pixels, Size: 1.65inch, Brand Zeblaze, Operation mode Full-Screen Touch + Press Button
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($42.02): BGc70579
2. ($42.02): BGbf11dd
apply code in your basket (cart) after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGGTSPRO2, BGGTSPRO1, band10, BGCNGTS4, BGGTSP5, BGGTS23, BGTS46863, BGWRIBAND10, BGGTSPRO7, BG2e709c, BG562ce6, BG2eb1f1, 6GSGIT, BG11ANV08, BGPRGTS, BG51f436, BGBF1110, BGefdf06, BGa5c362, BG92a890, BGGTSProFANS, BG2202FANS8, BG366bb6, BG320fb1, BG27df40
(I don’t think these’re gonna work, but you can try ’em out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Zeblaze GTS Pro Smart Watch [EU] ($-3)
Price history and price alert
Check out price history chart (for all/most countries) for Zeblaze GTS Pro Smart Watch.
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)).