HDMI IN: Video input HDMI IN: Video input USB-C: Video input (Please note in some USB webcams, only video can be captured.) 1/4" Screw Hole: Mount Instream Mini with camera ETHERNET PORT: Connect to Internet by Ethernet cable HDMI OUT: Video out to monitor or computer for Zoom/Skype meetings USB-C: Only for charging AUDIO OUT: Connect with 3.5mm monitor headphones LINE IN: Stereo, connect to electric guitar or synthesizer MIC IN: Mono, connect to microphone for recording SD Card Slot: Used for recording and loading graphics SIM Card Slot: Insert SIM card to connect to Internet