告別傳統(tǒng)的“叮咚”及老舊鈴聲更多經(jīng)典、流行和弦鈴聲，音量可達(dá)110分貝，不擔(dān)心老人聽不見。

Bid farewell to the traditional "Ding Dong" andthe old bell More cassi and popular chord ringtones, volume up Up to 110 decibels, not worrledthat the elderly can not hear.