Waterproof IP67 Waterproof, Size 47x 19x 12mm, Screen Display 0.96 inches IPS Screen, 7-15 days in standby, Strap: TPU, Control Method Single Touch, Bluetooth 4.0BLE, Material Case: ABS+PC, Battery 90mAh Polymer Lithium Battery, Life Time 5-7 days in use, Band Length 260mm.
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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 coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
1. ($20.52): BGc70579
put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): 5606ed, 502C6B, BRANDXS, bGhOnEy10, BGdragonBoat, BGSS10%SW, band10, BGCuponation10, BGWRIBAND10, 6GSGIT, BG51f436
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Here is price history (for all/most countries) for XANES Y10 Smart Watch Black. The lowest price was: $9.79.
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)).