The Taylor Guitars K4 equalizer is high-quality audio equipment with a microphone input and balanced output. This is the Taylor K4 Preamp/EQ, a DI preamp from Taylor that is probably hard to find these days. It's a DI with a preamp and EQ for acoustic guitars. Using the included stereo cable, you can output both line and microphone signals. The sound improves just by running your signal through it. As for the condition, there is some slight wear and tear. The included accessory is the power cable. Thank you for your interest. - Model: K4 - Brand: Taylor Guitars - Type: Equalizer - Output Type: Balanced Output - Input Type: Microphone Input - Features: Headphone Output - Power: DC 9V Thank you for looking.