8-channel, USB-connected, high-quality 24-bit/96kHz mixer. Features Bluetooth and digital effects. - Model Name: STUDIOLIVE AR8 USB - Connection Type: USB - Number of Channels: 8 channels - Digital Effects: Included - Sampling Rate: 24-bit/96kHz - Bluetooth Function: Yes - Included Accessories: Power cable, instruction manual Special Notes: Cleaned, but with some dirt and scratches. Final operational check completed. Some crackling in each knob. There is no extreme noise in the output, but there is noise from the main unit, so please be aware of this.