Vivitek Qumi Q3 Plus - Manual (Page 14)

8
Inserting a USB device
Connect a USB device to Qumi by inserting the device(s) into the appropriate port.
Connecting Audio
Connect earphones or speaker to Qumi by inserting into the AV-in port.
Bluetooth Audio out is also available under Settings, Bluetooth. Turn Bluetooth "ON" and pair
audio device.