Receive Sensitivity 102dB, Standby Time (h) 120h, Battery Capacity Charging box: 380mAh, Each earphone: 43mAh, bluetooth Version V5.0, 3.7V, Talking Time 4h, Charging Time (h) 1-2h, Microphone Yes, 3.7V, Impedance 16Ω, Transmission Distance 10m.
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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 Europe 
. There’s only 1 record in my database, so I have no idea if the price is OK. I found coupon for you. Check this out.
Link: Banggood product page
1. ($21.24): BGBRPL2
coupon code has to be applied in shop’s cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): 15earbud, TTxBG10, BG23QCYT1, BGQCY, BGwete4, BGOCYPL, BGQCYT11, BG20QCY, BGQCYT1C, aff7off, BGINQCY, BGT1C, BGT1C40, BGT1C709, BGYAT1C, BG3CSUM, BG3CTC1, BGT1CZM, AFfbG10, BGTWS20, BGT1C03, bg20qcy, BGQCYT1CC, BGQCY99, BGQCYZM, 502C6B, BGT1C22, BGQCXM1, BGESQCY, BGT1C77, BGT1CQCY, BGT1CCF, 2020CNY, BGNAQCYT1C, BGVDay10%off, 0e7f33, BG20TWS, BGT1C299, BGT1CCC, FBCOUPON1, BGT1C055, BGT1C33, BG2PRECIOSLOCURA, bGhOnEy10, BGAFF10OFF, BGT1C099, BGSS10%SW, BGQCY014, bgshOOp10, BGELIG0920, BG11SHOP, BG4BW25, BGLOAC1, 13f142, BGa0b145, 6GSGIT
(there’s a little possibility that old coupon will work)
Price history and price alert
Not enough data to show price history chart… $14.09 is the only recorded price. It was not cheaper than that since we have saved it in DB.
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)).