Ultra-compact all-in-one unit: 4 channel line mixer / stereo audio interface / Bluetooth receiver Each stereo jack input can be used as a stereo or as a mono input Extra input switch to receive audio signals from a computer or from the build-in Bluetooth receiver 16Bit – 48kHz audio converter The unit can be used as a sound card to record the mix of the line inputs on a computer 5V USB-C input to power the unit via: An external power adapter (cable + 230V adapter included) A power bank A computer (USB port)