Only right side earphone(A1523)
Because the earphones have been wrapped for a long time and are in a dormant state, customers need to charge them after purchasing them. The specific operation process is as follows:
(1) Note: All earphones and earphone charging cases must correspond to the model. If they do not correspond to the earphones and charging case models, they will not be able to connect;
Airpod 1st earphone model:
Left earphone (1722)
Right earphone (1523)
Charging case model: (1602)

(2) Before pairing, turn on the mobile phone Bluetooth to forget the device, then put the genuine earphones and replacement earphones into the earphone charging case, and charge the earphone charging case for more than 30 minutes;

(3) When the time is up, open the lid, press and hold the back button of the charging case for 10 seconds to see if the white light flashes. If the white light flashes and then turns yellow, continue to press and hold for 8 seconds. The white light flashes and pairing is complete.