A:Answer The back of the panel of the ACER LCD Monitor CB281HK has only an Audio In Port that can be connected to your computer or other components. Apparently, Audio In and Audio Out port are 'Optional' on different monitors but it is not clear which ones in the owner's manual. The Monitor has speakers and I tested it with playing a You Tube video of Muse's 'Madness' and the stereo was okay. I did not try to adjust volume or other settings, but it sounded just a little 'tinny' and soft to my ears. I use this monitor for a graphics application, so sound quality/reproduction is not a priority. I am very pleased with the image quality of the monitor.
