Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database.
Link: Banggood product page
Price: -3 USD
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
Old coupons (from the oldest to the newest): 10%ForBGBW, BGSK254, BGUG254, BGFLB1BR, BGFLB1, 13f142, BGa0b145, BG0c0a51, BGFLB11, BGFLB12, BGFLB113, BGFLB1D, BG033519, BGHOTSHOP15, BGb93285, BG53e9c8, BGAlerabatKL, BG57369f, BG1b5830, BGae043d, FLB1RSY88, BG8fe8ea, BG7f5195
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Do you need price history chart (for all/most countries) for BlitzWolf BW-FLB1 Bluetooth 5.0 Earphones? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).