AudioAccess PX-600 multi-zone preamp. Please review all pictures before bidding. I have tried to show the true condition in the photos. For testing, I hooked up a KPS-101 keypad programmed to zone 2 along with a single source and a powered speaker. Upon power up the led's light and the motorized volume knob moves to a preset position. The unit functioned and properly switched between sources. The volume up/down from the keypad functioned when the speaker was plugged into the preamp output. To be clear, I am offering no warranty or returns. The unit appears to be fully functional, but I am not an AudioAccess expert and can't guarantee every bit of functionality with this unit.