Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – BlitzWolf BW-BH1 Bluetooth Earphone [EU] (-3 USD)
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (14.44 USD): BGLOAC1
Coupon (15.29 USD): BG4BW25
Coupon (15.99 USD): 13f142
(CouponsFromChina.com tip: apply it in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BG89BH1, 899BH1, 15bh1, 12blitzw, aff7off, BGBWBH1, BGss10%bw, BGBH1CC, BGBH1ZM, AFfbG10, BGTWS20, BGBH1ZMQ, BGXMBH1, 502C6B, BGBH1BT, d3ea27, BGRBH1, BGVDay10%off, EARSP11, BGAFF10OFF, bGhOnEy10, BGBW152, BGBWUU1, BGSS10%SW, bgshOOp10, BGELIG0920, BGHALLOWEEN, BG11SHOP, 10%ForNewBW
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – BlitzWolf BW-BH1 Bluetooth Earphone [EU] (-3 USD)
Price history and price alert
Price history (for all/most countries) for BlitzWolf BW-BH1 Bluetooth Earphone is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).