Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
HSP, Microphone Yes, bluetooth protocol A2DP, 3.7V, Talking Time 100h, AVRCP, Transmission Distance 10m, bluetooth Version V5.0, Battery Capacity Charging box: 2200mAh, Earphone: 43mAh*2, Charging Time (h) 1.5 hours for earphone, 3.7V, HEP v1.6, 4 hours for charging box
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($42.20): BGBRPL2
2. ($42.20): BGHOTSHOP15
put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): AFfbG10, BGT1599, BGVDay10%off, EARSP11, bGhOnEy10, BG20HAY, BGITHAYLOU, BGT15011, bgshOOp10, BGELIG0920, BG11SHOP, HAYLOU15, BGLOAC1, 13f142, BGa0b145, BGBuscape01
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for Haylou T15 Bluetooth 5.0 Earphones.
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)).