价格很便宜，只要300人民币或者60美元或者60欧元就可以用一辈子。
用途是可以用来指定单路或者双路的带音频提示的定时器，可以用在一些需要定时提醒或者定时工作的场合。
也可以用来矫正一些音频设备的频率，提供比较准确的音频信号输出。
he price is very cheap, it can be used for a lifetime for only 300 RMB, 60 US dollars, or 60 euros.
The purpose is to specify a single or dual channel timer with audio prompts, which can be used in some situations that require timed reminders or scheduled work.
It can also be used to correct the frequency of some audio devices and provide more accurate audio signal output.
标签：used,双路,音频,Sounder,60,2025,dual From： https://www.cnblogs.com/gdigital/p/18033555