Redmi Airdots

Redmi AirDots S is on the Xiaomi mall,

 using a 7.2mm sound unit,

 supporting Bluetooth 5.0, about 

4 hours of single use, and about 12 hours of use with a charging box.

 It supports seamless switching between single and binaural modes. 

 4.1g, priced at 99.9 yuan.