Charging Time: About 2hours, Battery Capacity: 230mAh, Type: IPS, Band Length: about 214mm, Using time: About 5days, Product Weight: about 38g, Size: 1.28inch, Charging Type: Magnetic charging, Resolution: 240*240pixels, Band Size: about 20mm, Standby Time: About 10days, Waterproof IP68.
Price history, coupons and price alert are available on this page. 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 coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. I couldn’t find any coupon for this product on latest product update.
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): BGSE11, band10, bgshOOp10, BGHALLOWEEN, BGCuponation10, BG7398, BGWRIBAND10, 6GSGIT, BG51f436, BGc70579, BGf808be, BGe6ac33, BGbf11dd
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Do you need price history chart (for all/most countries) for SENBONO S11 Fitness Tracker? There we go. The lowest price was: $16.
Price records source(s): Gearbest, 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)).