有可能的话，通话时尽量使用免提扬声模式或有线耳机(不是蓝牙)。

Whenever possible, use the speaker-phone mode or a wired headset (not a Bluetooth).

youdao

这三款耳机各有利弊，但我在开车时仍喜欢用蓝牙免提。

Each of the three headsets has advantages and disadvantages but, for use in a vehicle, I still prefer a Bluetooth speakerphone.

youdao

VTech则在5145电话上选择使用蓝牙耳机同步技术，而非免提同步技术。

VTech chose to use headset Bluetooth synchronization on the 5145 rather than hands-free synchronization.

youdao