The Acer Chromebook C720-2103 is a lightweight, black laptop that runs on a web-based Google operating system. The Chromebook has access to all the apps provided with the Chrome Web Store and has two USB and one HDMI port for other media.
Intel Celeron 2955U / 1.4 GHz I found this by searching for (no quotes) ‘specs C720-2103’ on a very popular search engine; The top result pointed me to a CNET review; the model number matched as did your description of ports.
