How to connect earbuds with bluetooth devices ( smart phones/tablet)?

1.Power on, the earbuds will enter into pairing mode.
2.Turn on the bluetooth function on bluetooth device, search the earbuds, 
find the mode name and click to pairing.
3.If need input the password, please input 1234 or 0000
4.If the headset with NFC function, please use the phone’s NFC 
place to touch earbuds’ NFC place.