Mono Earbud Mode
Mono mode for Left or Right earbud:
Take the left or right earbud out of the charging case, it will power on and enter pairing mode automatically. Enable Bluetooth on your device and tap "HE180250" on the list to connect. If the left or right earbud has been used as Mono mode last time, it will connect with your last connected device automatically once it was pick up from charging case.
To Exit Mono mode:
Connecting the true wireless earbuds that will not pair together.
Turn OFF both sets by pressing and holding both multi-function button until both buds say 'power off'.
Turn ON both sets by pressing and holding both multi-function button until both buds say 'power on' but continue to hold the multi function button until 3 consecutive beeps are heard.
Re-pair to phones Bluetooth.
Please note: you may be required to 'forget device' for the older connection to these headphones in your Bluetooth settings.