HDMI IN: Video input USB IN: Video input (Please note in some USB webcams, only video can be captured. Also, HDMI IN and USB IN sources cannot be used at the same time) HDMI OUT: Video out to monitor or computer for Zoom/Skype meetings ETHERNET PORT: Connect to Internet by Ethernet cable LINE IN: Stereo, connect to electric guitar or synthesizer MIC IN: Mono, connect to microphone for recording AUDIO OUT: Connect with 3.5mm monitor headphones USB-C/TYPE-C: Power connector 1/4" Screw Hole: Mount YoloBox Mini with camera SIM Card Slot: Insert SIM card to connect to Internet SD Card Slot: It's used for recording only Power Button: Turn on and turn off