用这些服务打电话音质非常棒，听上去有点金属声但比普通电话清楚。

The calls on these services sound pretty good, a little tinny but clearer than my regular cell phone connection.

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它包含的音频对话框具有以下特点：语音合成、数字音频、声音识别和电话音质拨号输入和话音输入录制。

It includes audio dialogs that feature synthesized speech, digitized audio, recognition of spoken and telephone tone dialing input, and recording of spoken input.

youdao

当电话离基站较远时，电话音质就变模糊了，虽然VTech声称在900英尺的连接范围内能做到音质清晰。

The line became fuzzy when I moved too far away from a phone's base station, though VTech says a connection can stay clear for up to about 900 feet.

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