A:Answer It has three ports. One takes an HDMI cable, one takes a VGA cable, and one takes an adapter (included with the product) that takes 3 RCA cables (video, right-audio, left-audio). You may pick whichever cable you prefer but will get the best quality with HDMI.
Which type of cable you need would depend on the device that you are outputting from. Many modern laptops have only usb-c ports, so you may need a "usb-c to HDMI cable".