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key tone in a calculator? what is that?

Discussion in 'General Electronics Discussion' started by blackeagle222, May 3, 2013.

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  1. blackeagle222


    May 3, 2013
    Today I bought a simple calculator, but later on i noticed on the box that it has "key tone". It doesn't beep tho. I looked inside and there doesn't appear to be any extra wire so I guess it won't beep? Why am I asking such a question? Let's just say that if this beeped on my test in school nothing good would come from it...
    here are the photos
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