FreeBuds Pro wireless earbuds support the function of handheld phone call with headphones. When you wear headphones with both ears to talk, take off one earphone and press the earhandle sensor of the earphone in your hand twice. The earphone wearing the ear hears a tone indicating that the ear is in handheld mode.
Put the earphone 10cm near the mouth and hold the earbag with the earhandle facing the speaker.