A lavalier microphone is made for hands-free operation.

领夹式麦克风可免提操作。

Should you use a hands-free headset?

打电话的时候要用耳机吗？

You could use a hands-free device or an earphone.

可以使用免提设备或者耳机。

Use a hands-free device to make your calls and check your voice mail.

使用一个不用手持东东帮助打电话、查看语音信箱。

If you've got a hands-free headset, you could even pretend to be on the phone while working.

如果你有一个头戴式耳机，当你工作时可用来假装你在打电话。