bluetooth Version BT4.2 & above, APP Name Dafit, Waterproof IP68 Waterproof, Operating Mode Full Touch Screen, “Battery Capacity: 200mAh Standby Time: About 15 days Using Time: About 7 days Charging Time: About 2 hours Charging Method: Magnetic”, “Size: 1.7 inch Screen Type: IPS”, Brand LEMFO, Model LF27, Compatible System Android system 4.4 version or above; iOS system 9.0 version or above.
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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 code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($15.99): BG376eef
2. ($29.44): BG51f436
this code has to be applied in your 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/i1u
Old coupons (from the oldest to the newest): BGWRIBAND10, 6GSGIT
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for LEMFO LF27 Smart Watch. The lowest price was: $15.99.
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)).