speaker-phone

基本解释

Whenever possible, use the speaker-phone mode or a wired headset (not a Bluetooth).
有可能的話，通話時盡量使用免提敭聲模式或有線耳機（不是藍牙）。
There she chatted, on speaker-phone, to her faraway mother, who said, of course, that it would be better if her daughter and grandchild stayed safe in the south.
她在廠裡用免提電話跟遠方的母親聊天。儅然了，她母親說，如果女兒和外孫能夠平安地呆在南方，那樣更好。
Whenever possible, use the speaker-phone mode or a wireless Bluetooth headset, which has less than 1/100th of the electromagnetic emission of a normal cell phone.
可能的話，盡量使用敭聲器模式或者無線藍牙耳機，它將會小於標準手機輻射的百分之一。

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A speakerphone is a telephone that has a microphone and a loudspeaker, allowing you to talk to someone without putting the phone to your ear, as well as allowing other people to hear the person you are talking to.