Top provider of full range acoustic components: Piezo sounder, Magnetic sounder, Speaker and Microphone/Receiver.

全线声学器件供应商，产品包括：压电发声器，磁性发声器，扬声器及麦克风/听筒。

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The pull head and the pull ring on the zipper move to the closing end of the zipper; the iron sounder can separate from the magnetic body, and makes the sound to remind people to close the zipper;

拉链上的 拉头及拉环一向其闭合端移动，铁质发声器就会脱离磁性体而发出 响声，提醒人们关闭好拉链；

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