earpiece

n.

听筒；

复数：earpieces

1. The earpiece and microphone should not be less than 4lbs.
   耳塞和麦克风端不可小于4磅。
2. He used a computer that read into his earpiece while he was typing.
   他打字时，通过计算机可以将打印的内容读到听筒里。

Earpiece Cable Control
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