There are 4 HDMI inputs (3 on the back/bottom of TV and 1 on the side). There are the standard audit/video inputs. Chromecast is a device that you use to "mirror" what is on your tablet/phone directly to the TV. These are usually sold separately, but the Vizio has it built in. This was my first time buying a Vizio, but my sister has had one for years and not many issues. Hope that helps.