The Marshall ED-1 Edward the Compressor Guitar Effect Pedal is a classic analogue compressor unit designed specifically for electric guitars. As part of Marshall's range of effects pedals, this model offers high-quality compression to shape the tone and dynamics of your guitar sound. With its sleek design and reliable performance, the Marshall ED-1 is a must-have for any guitarist looking to achieve a polished and professional sound. Great condition but cannot find the box (I will keep looking and will include it if I find it)