Just check coupons out (with price alert and history). Do you want to know what the best price is?
Charging Time: About 2 hours, APP Name Haylou Fun, Bluetooth Version BT 5.0, Brand Haylou, Product Name RT, Product Model LS05S, Online Dial Replacement Support, Type: TFT, Operating Mode Full Touch Screen, Compatible OS Android 6.0 or above / iOS 11.0 or above, Charging Type: Magnetic charging, Using time: About 15 days(24 hours heart rate monitor mode), Resolution: 240*240pixels, Battery Capacity: 300mAh, Standby Time: About 20 days, Waterproof IP68, Size: 1.28 inch
Aliexpress
There’re some similar (or not) items 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. Too bad there’s no coupon right now 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): band10, BGHYRT, HAYLOU15, BGHAYRT, BGHU0451, BGd0f45b, BGWRIBAND10, BG00fe87, BG1905a8, BG77LS05S, BGd03330, BGHU0894, BGeebbad, BGf12376, BGb56f7a, BGcaa416, 6GSGIT, BG6c49b9, BG648fba, BG8de4d7, BG23da5a, BG22588c, BG51f436, BGc70579, BGLS05S, BG2f4c1a, BGHOBBY27, BGJP032, BGbe8c11, BG73e51e, BG10af3e, BGbf11dd, BG263d57, BGa504b7, BGe107dd, BGce699c, BG66bb72, BG35cffa, BG217661, BGCAPITALOS8
(probably won’t work, but you can try them out)
Price history and price alert
Here is price history (for all/most countries) for Haylou RT LS05S Smart Watch Global.
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)).