This is a used OneU mini power amplifier for home theater, office, vehicle, and more applications. It isbin excellent condition with standard wear from minimal uses. Had been set up to increase conference room audio. Power Output: 20W + 20W RMS (compatible with 4 to 8 Ohm speakers) Inputs: 3.5mm Aux (for phones/iPads) and RCA (for PC/TV) Design: Aluminum housing with a round, blue LED volume knob Safety: Built-in overload, thermal, and over-voltage protection Power Supply: Requires a 12V DC power adapter