If you mean the pronunciation of the 26 letters in PinYin,maybe I can help you.

There is no Chinese alphabet. Chinese is not written using letters. You can learn pinyin, this is the romanization of Chinese hanzi. There are many many sites online where you can study pinyin. Just type 'learn pinyin' or '学拼音' into your search engine.

do you have weixin or something that havs speaker tool?

You could take lessons from this channel. This video talks a lot about syllables. http://www.youtube.com/watch?v=eTVJE4lDYbQ

all you need is a voiced table of 410 Chinese syllables plenty of them in the internet