[Question] Could someone help me with diy amp?

Hello, few days ago I dismantled an old TV and what i found inside was a TDA7056B mono audio amp, i also have two 16 ohm 5W speakers which were connected in parallel. I would like to make a small sound system. Problem is I don't have any scheme how. Also i would like to power it of pc usb port because in the data sheet it said minimum input of 4.5 Volts. Datas sheet is here: http://pdf1.alldatasheet.com/datasheet-pdf/view/19425/PHILIPS/TDA7056B.html It says it has a dc volume control, what is that? Do i need it?