Thank you for viewing. I am selling this item due to equipment replacement. It is in overall good condition and has been tested. Please read this carefully. Please understand that the product is used, and purchase accordingly. We do not accept claims or returns after purchase. Portable stereo amplifier, can connect MIC and instruments. - Model Name: Mobile Cube - Input Terminals: MIC, Keyboard/Instrument/Guitar - Output: Stereo Output - Adjustment Functions: Volume adjustment knob, Echo adjustment knob