Impedance: 32ohm, Charge time: 1- 2h, Battery capacity: lithium-ion 350mAh, Standby time: 60h, Response frequency: 20 – 20000Hz, Music time: 1- 3h, Call time: 1- 3h.
Just check coupons out (with price alert and 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 price update (UTC time):
Price history and price alert
Do you need price history chart (for all/most countries) for i12 TWS Binaural Bluetooth V5.0 Earphones? There we go. The lowest price was: $13.69.
Price records source(s): Gearbest
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)).