Apart of the chosen SMS alert tone, you can set the ringing volume and ringing type.
除了所选择的短信提示音，你可以设置铃声音量和振铃类型。
In order to improve the ringing method of telephone used in power systems, a type of selective calling device using audio frequency has been developed.
为了使电力系统通信设备的呼叫装置更加使用方便工作可靠，我们研制了以按键电话机发出双音频呼叫信号进行选择接收的音频选号装置。
If you are just a type of person who gets out of bed when ever you want to, and you never end up getting out, even if the alarm keeps ringing, then it's time you used this tip.
如果你是那种心里想起床才会起床，纵使闹钟响个不停最后也不会起来的人，现在可以用这个方法。
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