①: Type-C * 3
⑨: USB * 4
⑥: Audio * 2
⑧: mini DP plug * 1
⑥: mini HDMI * 1 (standard HDMI video signal interface, used as a TV)
②: SD short * 1 (standard card reader interface)
⑤: SD length * 1 (standard card reader interface)
⑦: VGA * 1 (standard display signal interface, used for the projector)
③: HDMI * 1 (standard HDMI video signal interface, used as a TV)
④: RJ45 * 1 (standard network signal interface, used to connect to the router, etc.)