This is a vintage TOA P-906MK2, 900 Series, Class AB Mixer Amplifier from Japan. A 10 page manual is included. When turned-on, the power light is on. The Signal and Normal lights briefly appear (as they are supposed to do). The Protect light also comes on and stays on for the appropriate five seconds, with the appropriate "click" sound, before going off. Further testing was not conducted. The unit has a few minor scratches. Operating instructions (10 pages) are included. See photos. $40 or Best Offer.