Used. Mono. Hand build based on Wollensack T-1515 reel to reel recorder tube unit. Size -- 10" x 10". Has metal base for easy installation on anything. Design - tube amp rebuild , tested, installed on clear plastic and then installed on metal base. Real piece of vintage electronics from 1959. Works good. Unique look and sound. 25- 40 w output. Input signal source is 1/4" connector . Perfect for use as guitar amp. 4 tubes - 12ab5 (2) , 12at1, 12ax1. In my personal use 3 years. Works every day in our shop for customers. ( Playing jazz music). Has blue illumination on bottom. Power cord and speaker cables included. Free shipping in USA.