Dear frined, If you want to use 2 pcs earphone together, and pls follow next Step:

1. turn on 2 pieces earphone, and it will pair (Automatic or manual pairing)

2. open your Bluetooth mobile phone

3. leave earphone cellphone pair (Pls check the earphone Manual and more detail)

4. And then it can work well for you

Bluetooth version: 5.0
Noise reduction version: CVC8.0
Working distance: 10m connection
Product parameters
Single headphone capacity: 50 mAh
Charging compartment capacity: 3000 mAh
Automatic pairing: support
Music time: 220 hours or so (need to be used with the charging bin)
Talk time: 300 hours or so (need to be used with the charging compartment)
Product Features
Next song switching, play/pause, call rejection
Last replay, one key Siri