Impedance 32Ω, Working Time (h) 20h, Microphone Yes, Charging Time (h) <0.5h, Transmission Distance 10m, Taking Time 20h, Standby Time (h) 300h, Waterproof IPX5, bluetooth Version V5.0, Battery Capacity 150mAh, Frequency Response 20-20kHz, 3.7V. You can create price alert here, copy coupons and view price history. Best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
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. ($6.99): BGdcec12
2. ($19.54): BGAlerabatKL
this code has to be applied in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGBWBH2, BGBH222, BW-LT22, AFfbG10, BGBWBH299, BGVDay10%off, EARSP11, BGAFF10OFF, bGhOnEy10, BGBWUU1, BGSS10%SW, BGBW152, 13f142, bgshOOp10, BGELIG0920, BG11SHOP, BGHU0232, 10%ForNewBW, BGLOAC1, 10%ForBGBW, BGa0b145, BGBuscape01, BGHOTSHOP15, BGYBBH2, BG7ad545, BGd173b4, BG592ef8, BGAudioVideo
(there’s a little possibility that old coupon will work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – BlitzWolf BW-BH2 Bluetooth 5.0 Earphone [EU] ($-3)
Price history and price alert
Do you need price history chart (for all/most countries) for BlitzWolf BW-BH2 Bluetooth 5.0 Earphone? There we go. The lowest price was: $6.99.
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)).