A:AnswerThis monitor has built-in speakers so you can connect one end of the audio cable to the audio-in port on the monitor and the other end should be connected to the audio-out port of your sound card on your computer.
A:AnswerThe second link you provided:
http://www.bestbuy.com/site/Asus+-+21.5%26%2334%3B+Widescreen+Flat-Panel+LED-LCD+HD+Monitor+-+Black/1655189.p?id=1218277383660&skuId=1655189#tab=specifications
If you scroll down some more, you'll find that there's a line that says, "HDMI input: Yes" so there is an HDMI input for this model.