My monitor came with a VGA and a DVI input – no HDMI jack. I’m using my original Belkin VGA cable. Haven’t experienced any power supply high pitched whine as others complained about. Mine came with a power brick. This is a computer monitor and not a flat screen TV so I wasn’t expecting built-in speakers (there aren’t any).

https://www.amazon.com/Acer-G276HL-Gbd-27-Inch-Widescreen/dp/B00G5AEZOQ