Model S30, Charging Time: About 2 hours, Battery Capacity: 360mAh, Standby Time: About 60 days, Using time: About 7 days, Resolution: 240*240pixels, Compatible OS Android 4.4 or above, Waterproof IP68, Charging Type: Magnetic charging, APP Name F FIT, Type: TFT, Dial Size: about 47*47*13mm, Bluetooth Version BT 5.0, Product Weight: about 48g, Size: 1.3inch, Customized Watch Face Support, iOS 9.0 or above, Operating Mode Full Touch+Press Button, Band Size: about 212*22mm.
Basically copy coupon, view price history or create e-mail price alert. What is best price?
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in Europe 
. I don’t really know if this price is reasonable, coz there’s no price history in my DB.
Link: Banggood product page
1. ($29.69): band10
2. ($29.69): BGWRIBAND10
3. ($31.99): 13f142
this code has to be applied in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGSEN30, BGSS10%SW, BGPLS30, BG2SEN30, 6GSGIT, BG51f436, BGc70579
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – SENBONO S30 Fitness Tracker ($-3)
Price history and price alert
It’s a new item in our database, so I can’t create price history chart. We have saved this price in database: $18.99.
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)).