This unit uses an advanced IC which has been preprogrammed to create a realistic ?Ding Dong? sound. Once its push button switch is pressed it produces a ?Ding Dong? sound effect twice. It is a useful unit having many applications such as door bells alarms
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This unit uses an advanced IC which has been preprogrammed to create a realistic ?Ding Dong? sound. Once its push button switch is pressed it produces a ?Ding Dong? sound effect twice. It is a useful unit having many applications such as door bells alarms telephone ringer clocks timers shop entrance bell etc.
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