Go down and check coupons out. Remember to check price history if it is available. Do you want to know what the best price is?
Using time: About 7 days, Band Size: about 255*20mm, Resolution: 240*240pixels, Battery Capacity: 150 mAh, Charging Time: About 2 hours, Dial Size: about 43*43*12mm, Standby Time: About 15 days, Charging Type: Clamp Charging, Product Weight: about 30g, Type: IPS, Size: 1.3 inch
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 China. I’m afraid that there’s no working coupon in Banggood.
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!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGLYN01, band10, BGCuponation10, BGWRIBAND10, BG087980, 6GSGIT, BG51f436, BGc70579, BGbf11dd
(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
Price history (for all/most countries) for LYNWO BT01 Fitness Tracker is here.
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)).