How finish series connection of left and right earbuds?

The reset process includes clearing the left and right headphone series connection records and the headphone pairing with the device.

How to series connect:

After the earphone is reset, the left and right earphones will be switched on at the same time (within 20 seconds), and the earphone will finish series connection automatically. After successful connection, the white indicator light of the left or right earphone will flash slowly, and the indicator light of the other earphone will be turned off. Once the left and right earphones have been connected in series, the earphone will be connected again automatically.