Model T12, Supported Profiles HSP/HFP/A2DP/AVRCP, Music Time (h) 4h, Volume Control Yes, Interface Type Type-C, Brand QCY, Charging Box: 380mAh, Color White, Battery Capacity Earbud: 40mAh, bluetooth Version V5.1, Material ABS & PC, Wearing Type Half-In-Ear, Frequency Response 20-20kHz, Transmission Distance 33 feet (10m), With Microphone Yes, Waterproof IPX4, Charging Time (h) 2h.
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.
Updated:
Banggood
Warehouse in China.
Link: QCY T12 TWS Earphones
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Additional Banggood coupons:
1. First page
2. Second page
Price history and price alert
Do you need price history chart (for all/most countries) for QCY T12 TWS Earphones? There we go. The lowest price was: $18.99.
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)).