| 摘要 |
<p>The invention relates to improvements to hands-free devices, which are embodied as the introduction of new performance aspects for the device as a result of the modification of the microphone controls, which incorporates, in the microphone, a USB charging connector, thereby eliminating from the subject matter of the main patent a cable that connects the electronics of the left-hand box to a charging connector, and optionally, in addition to the push-key, a second key is added for adjusting the volume thereof.</p> |
