Only the main unit and instruction manual are included. Operation has been confirmed. You can receive video by inputting HDMI from devices like iPhone, iPad, and Macbook. Connection terminal: USB-C (This model does not support audio transmission) It's convenient to connect this unit to a PC's HDMI output and record the PC operation screen using an app on your iPhone or iPad. The rightmost LED indicator does not light up when charging, so the battery may be depleted, but power can be supplied via USB-C from an external battery, etc. I have confirmed that video transmission works without problems, but I am selling it at a low price, so please understand that it is non-refundable and non-returnable (NCNR).