Charging Time: About 2 hours, Heart Rate Monitor Support, Using time: About 7-10 days, Waterproof IP68, Multi-sport Mode Support / Build-in 20 sports, Blood Oxygen Monitor Support, Model MAGIC 3, Charging Method: Magnetic, Type: TFT, Battery Capacity: 220mAh, CPU nRF52840, Brand KOSPET, Standby Time: About 35 days, Pixel: 280*320, bluetooth Version BT 5.0, Size: 1.71 inch.
Go down and check coupons out. Remember to check price history if it is available. You probably want to know 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 price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($46.91): BGc70579
2. ($46.91): 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/i1u
Old coupons (from the oldest to the newest): BGMAGIC3, band10, BGEEUKOSPET, BGKPMG3, BG833a30, BGKOPMG3, BGaa8131, BG770359, BG20177f, BG51f436, BG390b08, BG305434, BGde249f, BGbda786, BG343102, BG83c8e9, BGad8fc0, BGfd149b
(there’s a little possibility that old coupon will work)
Price history and price alert
Here is price history (for all/most countries) for KOSPET Magic 3 Smart Watch. The lowest price was: $19.99.
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)).