Frequency Response 20-20KHz, Taking Time 2h, Working Time (h) 2h, Charging Case: 280mAh, Waterproof Level IPX45, Wired Control Not support, Battery Capacity Earphone: 45mAh, Charging Time (h) 40m, 3.7V, Microphone Yes, Standby Time (h) 2.5h, Support agreement HFP/HSP/A2DP/AVRCP, bluetooth Version 5.0, Impedance 16Ω, Compatible with IOS/ANDROID/WINDOWS, 3.7V, Transmission Distance 10m.
You can create price alert here, copy coupons and view price history. You probably want to know what is the 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. ($20.60): BGBRPL2
2. ($20.60): BGHOTSHOP15
paste coupon code in your cart and click Apply 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): BGA6X, BGBK15, BGBAK15, BG11SHOP, 13f142, BG4BW25, BGLOAC1, BGa0b145, BGBuscape01, BG651551
(there’s a little possibility that old coupon will work)
Price history and price alert
Here is price history (for all/most countries) for A6X Bluetooth 5.0 TWS Earphones. The lowest price was: $7.99.
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)).