speaker phone

基本解釋

Don't use a speaker phone unless absolutely necessary.
若非必要，不要使用電話的免提功能。
Land lines: several phones to allow people to make and receive phone calls, with speaker phone capability.
固定電話線：多放置幾個帶有揚聲器功能的電話以允許人們自由使用。
Ditched the landline? Use a hands-free device like a headset or talk on speaker phone (preferably the former when in public).
除了座機，用免提設備像耳機或者用揚聲器電話交談（公開場合前者更好）。

At a news conference, Speaker Nancy Pelosi said she had just received a phone call from the president, and she paid tribute to the president's leadership.

There's no need to schedule formal meetings or herd everyone around a speaker phone.
ENGADGET: Self-balancing Anybots QB now shipping, the future of telepresence is now (video)
The phone also had a high screen-to-frame ratio of 0.693, a 13-megapixel camera, and better quality speaker phone capabilities for hands-free calls.
FORBES: CES 2013: Huawei Challenges Samsung With 'World's Biggest Smartphone'
One of the biggest surprises, however, was the speaker phone, which was loud, clear and one of the best we've heard in a long time.
ENGADGET: Droid RAZR HD and RAZR MAXX HD review Mobile

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.