This is the Silvertone Model 1457, commonly referred to as the "Amp in a case."  This is a fun guitar with two lipstick pickups, and a broad tonal control via its tone/volume knob setup for each pickup.  The case to the Model 1457 features a built-in amplifier. The amplifier features two inputs, tube driven tremolo, and an 8" Jensen Special Design speaker. Tones ranging from sparkly cleans to compressed overdrive are obtainable from this amplifier. Plug it in and turn it up!